Ms

grammar
Miss, Mrs, Ms and Mr are all titles that we use in front of somebody's family name, NOT their first name, unless it is included with the family name: Is there a Miss (Tamsin) Hudson here? • Hello, Miss Hudson, come this way (NOT Miss Tamsin).

Longman Dictionary of Contemporary English

MS

I. MS /ˌem ˈes/ BrE AmE noun [uncountable]
(multiple sclerosis) a serious illness that gradually destroys the nerves, causing weakness and inability to move
II. MSc /ˌem es ˈsiː/ BrE AmE British English, MS American English noun abbreviation for
1. Master of Science; a university degree in a science subject that you get after studying for a year or two longer after your first degree, the ↑BSc. MSc is written after someone's name to show that they have this degree:
Sheila Cole, MSc
She has an MSc in engineering.
2. Master of Science; in Scotland and at the universities of Oxford and Cambridge, a university degree in a science subject which is of the same level as a BSc in other universities ⇨ ↑ma

Ms

Ms BrE AmE British English, Ms. American English /mɪz, məz/
used before a woman’s family name when she does not want to be called ‘Mrs’ or ‘Miss’, or when you do not know whether she is married or not ⇨ miss, Mrs:
Dear Ms Johnson, ...

ms

ms noun (plural mss) [countable]
the written abbreviation of manuscript

Mrs

Mrs BrE AmE British English, Mrs. American English /ˈmɪsəz, ˈmɪsɪz/
1. used before a married woman’s family name to be polite when you are speaking to her, writing to her, or talking about her ⇨ miss, Mr:
Mrs. Smith
Mrs Meddeman heads the fund-raising committee.
Mr and Mrs David Smith
► Some married women prefer to be addressed as Ms because it does not draw attention to whether or not they are married.
2. Mrs Tidy/Mrs Efficient/Mrs Nosy etc spoken used humorously to say that a woman has a particular quality or behaves in a particular way:
Mrs Superefficient has already taken care of it.

Ms.

I. Ms BrE AmE British English, Ms. American English /mɪz, məz/
used before a woman’s family name when she does not want to be called ‘Mrs’ or ‘Miss’, or when you do not know whether she is married or not ⇨ miss, Mrs:
Dear Ms Johnson, ...
II. Ms. BrE AmE trademark
a US magazine for women, started by the ↑feminist writer Gloria ↑Steinem

Oxford Advanced Learner's Dictionary

MS

MS [MS] (NAmE also M.S.) [ˌem ˈes] [ˌem ˈes] abbreviation

1. multiple sclerosis

2. manuscript

3. = MSc

Ms

Ms (BrE) (also Ms. NAmE, BrE) [mɪz] [mɪz] [məz] [məz] abbreviation
a title that comes before a woman's family name or before her first and family names together, and that can be used when you do not want to state whether she is married or not
• Ms Murphy
• Ms Jean Murphy
compare Miss, Mrs
Word Origin:

[Ms] 1950s: combination of Mrs and Miss (see miss).

Cambridge Advanced Learner's Dictionary

Cambridge Advanced Learner's Dictionary - 4th Edition

ms noun [ C ] ( plural mss )

written abbreviation for manuscript

Ms / məz / / mɪz / noun

A2 a title used before the family name or full name of a woman, used to avoid saying if she is married or not:

Ms Hill/Ms Paula Hill

[ as form of address ] What can I do for you, Ms Wood?

→ Compare Miss , Mr , Mrs

MS / ˌemˈes / noun [ U ]

abbreviation for multiple sclerosis

Collins COBUILD Advanced Learner’s English Dictionary

Ms

/məz, mɪz/

Note: in AM, use 'Ms.'

Ms is used, especially in written English, before a woman’s name when you are speaking to her or referring to her. If you use Ms, you are not specifying if the woman is married or not.
...Ms Brown.
...Ms Elizabeth Harman.

N-TITLE

Merriam-Webster's Advanced Learner's Dictionary

Merriam-Webster's Advanced Learner's Dictionary:

MS

MS abbr
1 Mississippi
2 multiple sclerosis

Ms.

Ms. US or Brit Ms /ˈmɪz/ noun
- used as a title before a woman's name instead of Miss or Mrs.
• Ms. Smith
• Ms. Jane Smith
✦Ms. can be used whether or not a woman is married.
- compare miss, mrs.