MD
Longman Dictionary of Contemporary English 5++LDOCE 5++MD British English, M.D. American English /ˌem ˈdiː/ noun 1. [countable]MN (Doctor of Medicine) a university degree in medicine that you can get after your first degree 医学博士2. [countable] British EnglishBB the abbreviation of managing director / managing director 的缩写 ，总经理，总裁 → CEO3. [uncountable] the abbreviation of muscular dystrophy / muscular dystrophy 的缩写 ，肌肉萎缩（症）From Longman Business DictionaryMDMD noun [countable] British English informalJOB the MANAGING DIRECTOR of a companyWe all laughed at the MD’s jokes, or got fired.
MD nounChinese
Business in university can get after that you a medicine degree
MD
Ma‧ry‧land /ˈmeərilənd/ 
written abbreviation, MD
a state on the east coast of the US, and one of the 13 original states of the US. Its largest city is Baltimore, which is a busy port.
MD British English, M.D. American English /ˌem ˈdiː/ noun
1. [countable] (Doctor of Medicine) a university degree in medicine that you can get after your first degree
2. [countable] British English the abbreviation of managing director ⇨ CEO
3. [uncountable] the abbreviation of muscular dystrophy
| I |
written abbreviation, MDa state on the east coast of the US, and one of the 13 original states of the US. Its largest city is Baltimore, which is a busy port.
| II |
British English, M.D. American English /ˌem ˈdiː/ noun1. [countable] (Doctor of Medicine) a university degree in medicine that you can get after your first degree
2. [countable] British English the abbreviation of managing director ⇨ CEO
3. [uncountable] the abbreviation of muscular dystrophy