The Chinese word for teacher is
老师

lǎo shī

Chinese Definition

teacher
1. 名词. 教師、老師
Components
老
1. old; aged; elderly
(ant, zh, 幼, 少)
老樹 - old tree
老婦人 - old woman
人老了記憶力就差了。 - One's memory worsens when age increases.
2. old (as opposed to new); of long standing
(ant, zh, 新)
老歌 - old song
老朋友 - old friend
3. outdated; old-fashioned
4. original; former
老地方 - usual place
老本行háng - original profession
5. the elderly; one's elders
敬老 - to respect the elderly
6. (Used after the surname of an old person to address a venerable old person)
王老 - revered old Wang
7. (figurative) experienced
(ant, zh, 嫩)
老手 - an old hand
老兵 - veteran
8. (literary) to respect (the elderly, one's elders)
9. (of cooked food) overcooked; tough; stringy; hard
牛排太老了，我咬不動它。 - The steak was so tough I couldn't eat it.
這雞蛋煮老了，你沒掌握好火候。 - This egg is hard; you didn't time it properly.
10. (of food or potable liquids) stale; not fresh
11. always; all the time
你別老這樣！ - Stop being always like this!
12. (chiefly dialectal) very; quite
老早 - very early
他人老好了。 - He is such a nice person! colloquial, somewhat regional
看到儂真個老開心。 (2khoe tau&3non&1tsen geq&3lau&1khe xin, SH) - I am really happy to see you.
13. (euphemistic, of an elderly person) to die; to pass away (usually with tr=le)
14. (affectionate, respectful) (Used before surnames to refer to heads or elder members of families.)
→ 小 (for younger people)
老張馬上來了，我得děi 趕緊收拾一下屋子。 - Old Zhang is going to be here any minute. I need to hurry up and straighten the room up a bit.
15. (usually respectful and affectionate) (Used by analogy in several other relationship terms.)
老師 - teacher
老婆 - wifey
老公 - hubby
16. (obsolete, originally, honorific) (Prefix for animals or people considered senior, fierce, and often awe-inspiring.)
老鷹 - eagle
老虎 - tiger
老鼠 - mouse, rat; (obsolete) bat
老狼 - (rare) elder and experienced wolf
老貓 - (rare) elder (potentially annoying) cat
老狐狸 - (surviving usage) elder, cunning and experienced fox
老傢夥 -
老東西 -
老雜碎 -
17. (colloquial) (Used before nouns, especially names of ethnicities, places and countries, to form nouns.)
老外 - foreigner; (pejorative) layman, one who lacks knowledge of a subject
老美 - Yank
老表 - a friend (direct speech, may be intimate or offensive depending on provinces)
老毛子zi - (pejorative) Russian person
老蒙古 - (pejorative) Mongols
老北京 - indigenous Beijing person
老山東 - indigenous Shandong person
老西兒r - (affectionate) Shanxi person
老回回 - Hui person (affectionate in some cases, pejorative in other cases, never neutral, depend on the region, speaker, listener situation and speaking mood)
18. Short for 老子, Laozi; Lao Tzu
19. (Mainland China, Hong Kong) Short for 老撾, Laos
师
1. Simplified form of 師

Translations for 师 and their definitions

教師
1. n. teacher; instructor

教师
1. Simplified form of 教師

老師
1. n. teacher
特教老師 - special ed teacher
向老師請教 - to ask for advice from the teacher
去學校當實習老師 - to do teaching work experience at a school
我的老師給我很大壓力。 - My teacher puts me under a lot of pressure.
現在有很多師生都聯名寫信要yāo求取消老師的教授資格。 - Many teachers and students are now jointly writing to request the cancellation of the teacher’s professor eligibility.
2. n. (a term of address for a teacher)
在陳老師的春風化雨下，我學會了如何待人接物。 - Under the positive influence of Teacher Chen, I've learnt to how to get along with others.
3. n. (honorific, polite) (a term of address for an adult, particularly a writer or an artist)
曹老師業餘喜愛閱讀，尤愛讀傳zhuàn記、歷史、經濟和國際時事書刊。 - Mr Cao loves reading in his spare time, especially biographies, and books related to history, economics and international current affairs.