Written Abbreviations You Must Expand When You Speak: Mr., Mrs., Dr., St. and the Rest

You get into the car and the driver asks where you are going. You look at your phone and read: "1425 Oak Ave., Apt. 3B." What comes out of your mouth is "one four two five Oak A-V-E, A-P-T three B." The driver blinks. Every letter you said was on the screen, and none of it was English.

Later that day you look at "Mrs. Parker" and try to build a pronunciation out of the letters M, R and S. That is impossible: the word those letters stand for contains none of them in that order.

This is not a vocabulary problem. It is a reading problem, and there is one rule that solves almost all of it.

The rule

An abbreviation that is a shortened spelling of an ordinary English word is spoken as the full word. Never as separate letters, and never as the fragment printed on the page.

You read "Dr. Smith" as Doctor Smith. You read "123 Main St." as one twenty-three Main Street. You read "approx. 40" as approximately forty. The written form is a space-saving device for the eye. It has no spoken form of its own.

Why: these are typography, not words

Centuries of expensive paper and narrow columns taught printers to shorten whatever appeared constantly: titles before names, street types after names, the fixed parts of a company name. The shortening happened on the page only. Nobody ever greeted anybody as "Emm-Arr."

So an abbreviation like Mr. behaves like a symbol, not like a spelling. It is closer to & than to a normal word. You do not pronounce & as "ampersand" in a sentence; you say and, because the symbol is a picture of a word. Titles and street types work the same way.

Hence the test: is there an ordinary English word hiding behind these letters? If yes, say the word. Only when each letter stands for a separate word (CEO, MBA, FBI) do you say the letters.

Titles before names

These appear in every email, every classroom and every introduction, so they are worth memorizing as sounds rather than as spellings.

Mr. and Mrs., the two that betray you

Mr. is mister, /ˈmɪstɚ/. Notice that there is no letter representing the /ɪst/ in the written form at all. You cannot decode it; you have to know it. Unstressed and fast, it often reduces to /mɪstɚ/ with a very light second syllable: "Mr. Delgado" sounds like /ˈmɪstɚ dɛlˈɡɑdoʊ/.

Mrs. is the big one. It is missus, /ˈmɪsɪz/. It is not "mistress," even though historically that is where it came from. It is also not "misses" with a hissing /s/ at the end. The final consonant is a clear voiced /z/: /ˈmɪs-ɪz/. Two syllables, /s/ in the middle, /z/ at the end. If you say /ˈmɪstrɪs/ you have said a different, and rather old-fashioned, word.

Ms. and Miss

Ms. is /mɪz/, one syllable, ending in /z/. It was invented deliberately so that a woman's title would say nothing about whether she is married, exactly as "Mr." says nothing about a man. Miss is /mɪs/, ending in /s/, and it is not an abbreviation at all, which is why American style writes it without a period. The whole difference between the two is the voicing of the last consonant, so practice them as a pair: /mɪz/ against /mɪs/.

Dr., Prof., Rev.

Dr. is /ˈdɑktɚ/. Two things matter in American English: the /kt/ in the middle stays a clean two-consonant sequence (no flap, no swallowed /t/), and the ending is the r-colored /ɚ/, not a plain vowel. Prof. is /prəˈfɛsɚ/, with a reduced first syllable and the stress on fes. Rev. is /ˈrɛvɚənd/, three syllables, and it is used with the full name: "Rev. Anna Blake."

Military ranks, where the surprises live

Sgt. is sergeant, /ˈsɑrdʒənt/. This one shocks people. The spelling has "ser," yet the vowel is /ɑr/ as in "car," and the "g" is /dʒ/ as in "judge." Capt. is /ˈkæptən/, with the second syllable reduced. Lt. in American English is lieutenant, /luˈtɛnənt/, starting with /lu/. The British /lɛf/ pronunciation is not used in the United States.

Jr. and Sr.

After a name, Jr. is junior, /ˈdʒunjɚ/, and Sr. is senior, /ˈsinjɚ/. "Robert Chen Jr." is spoken "Robert Chen Junior."

Addresses and places

Street abbreviations follow the same rule, with one extra complication: position can change which word the letters stand for.

St. means two different things

Before a name, "St." is Saint, /seɪnt/: St. Louis, St. Patrick, St. Petersburg. After a name, at the end of an address, "St." is Street, /strit/: Main St., 4th St., Bleecker St. Position decides, and it is never ambiguous in practice because saints come first and streets come last.

Dr. has exactly the same double life. Before a person's name it is Doctor. Inside an address, after a street name, it is Drive, /draɪv/. "Dr. Ruiz lives on Maple Dr." is spoken "Doctor Ruiz lives on Maple Drive."

The rest of the street types

Ave. is Avenue, /ˈævəˌnu/, three syllables. Blvd. is Boulevard, /ˈbʊləvɑrd/, and the first vowel is /ʊ/ as in "book," not /u/ as in "boot." Rd. is Road /roʊd/, Ln. is Lane /leɪn/, Ct. is Court /kɔrt/, Hwy. is Highway /ˈhaɪˌweɪ/. In place names, Mt. is Mount /maʊnt/ (Mt. Rainier is "Mount Rainier") and Ft. is Fort /fɔrt/ (Ft. Worth is "Fort Worth"). Compass letters expand too: N. is North, S. is South.

Saying the number out loud

Americans do not read house numbers as whole quantities. They group the digits in twos. 1425 Oak Ave. is "fourteen twenty-five Oak Avenue," never "one thousand four hundred twenty-five." Three-digit numbers split one plus two: 123 is "one twenty-three." A zero inside the pair becomes "oh": 1005 is "ten oh five," and 207 is "two oh seven." Round numbers stay whole: 1400 is "fourteen hundred." Zip codes, on the other hand, are read digit by digit: 63110 is "six three one one oh."

Business and general abbreviations

Inc. is Incorporated, /ɪnˈkɔrpəˌreɪtɪd/, Ltd. is Limited, Co. is Company, and Dept. is Department, /dɪˈpɑrtmənt/. In a document you read approx. as approximately, /əˈprɑksəmətli/, and est. as established, /ɪˈstæblɪʃt/. In an address, Apt. is apartment, /əˈpɑrtmənt/.

Then there is no., meaning number, /ˈnʌmbɚ/. This one surprises everyone, because the letters spell the English word "no" and there is no "n-o" in "number" in that order for a reason: it comes from Latin numero, and the "o" is the last letter of the Latin word, not part of English at all. "Room no. 4" is "room number four."

The reference table

The exceptions

1. Initialisms are said as letters

When the letters stand for separate words rather than for one word, you say the letters: PhD "pee-aych-dee," MD "em-dee," BA, MBA, CEO, CFO, ID, ATM. The stress falls on the last letter: /ˌsiiˈoʊ/ for CEO. These are not shortened spellings of a word, so there is no word to expand into.

2. Clippings are already real spoken words

This is the distinction that clears up the confusion. A clipping is a word that people actually shortened in speech: ad, app, exam, lab, gym, vet, fridge, photo, bike. Nobody says "advertisement" when they say "ad." The short form is the word now. An abbreviation like "Dr." is only a written shortcut and has no spoken life of its own. Clippings are written without a period, which is a useful visual clue: app, not app.

3. Some business abbreviations have crossed over

"Inc." and "Corp." started as pure written shortcuts, but Americans now often say them as clipped words: "Acme Inc." is frequently /ˈækmi ɪŋk/, and "Corp." is /kɔrp/. Both the full and the clipped versions are acceptable. "Ltd." and "Co." have not crossed over; expand those.

4. The period is invisible in speech

American style writes Mr., Dr. and St. with a period; British style writes Mr, Dr and St without one. The rule for the dot is whether the abbreviation ends with the last letter of the full word. None of this changes the pronunciation by one millisecond.

The drill: five steps out loud

Do these aloud, in order. Each one takes about a minute.

1. The Mrs./Ms./Miss triangle. Say /ˈmɪsɪz/, /mɪz/, /mɪs/ five times in a row, slowly, and put a finger on your throat. You should feel a buzz through the last sound of the first two and no buzz on the third.
2. Names with titles. Read this list aloud, expanding every title: "Mr. Alvarez, Mrs. Okonkwo, Ms. Bianchi, Dr. Haddad, Prof. Lindqvist, Sgt. Reyes, Capt. Moore, Robert Chen Jr." Answer: mister, missus, miz, doctor, professor, sergeant, captain, junior.
3. The full mailing address. Read this out loud as if to a driver: "Dr. Elaine Ruiz, 2130 Maple Dr., Apt. 4C, St. Louis, MO 63110." Answer: "Doctor Elaine Ruiz, twenty-one thirty Maple Drive, apartment four C, Saint Louis, Missouri, six three one one oh." Note that "Dr." is Doctor at the front and Drive in the middle, and "St." is Saint here because it comes before a name.
4. Number grouping. Say these house numbers: 1425, 207, 1005, 1400, 89, 3607. Answer: fourteen twenty-five, two oh seven, ten oh five, fourteen hundred, eighty-nine, thirty-six oh seven.
5. Sort the exceptions. Go through this list and decide word or letters: PhD, Dept., app, CEO, approx., gym, Ltd., MBA, no. Answer: letters, word, word as written, letters, word, word as written, word, letters, word.

One rule covers almost everything: if there is a real English word behind the letters, say the word. To drill these titles and street words until they come out automatically, work through word-level pronunciation practice, then put them into full addresses and introductions with sentence practice.