Merriam-Webster's Collegiate Dictionary
pro·tec·tor
\\prə-ˈtek-tər\\ noun DATE 14th century
1.
a. one that protects : guardian
b. a device used to prevent injury : guard
2.
a. one having the care of a kingdom during the king's minority : regent
b. the executive head of the Commonwealth of England, Scotland, and Ireland from 1653 to 1659 — called also
Lord Protector of the Commonwealth
•
pro·tec·tor·ship \\-ˌship\\
noun Oxford Advanced Learner's Dictionary-牛津双解-OALD7
protector
pro·tect·or / prE5tektE(r) / noun a person, an organization or a thing that protects sb / sth
保护人(或组织、装置等):
I regarded him as my friend and protector.
我视他为我的朋友和保护者。
the company's image as a protector of the environment
这个公司作为环境保护者的形象
Hard hats and ear protectors are provided.
提供了安全帽和护耳。
Webster's Third New International Dictionary, Unabridged
pro·tec·tor
\prəˈtektə(r)\
noun
(
-s)
Etymology: Middle English
protectour, from Middle French, from Late Latin
protector, from Latin
protectus (past participle of
protegere to protect) +
-or — more at
protect
1.
a. : one that protects or shields especially from danger or harm
: guardian
,
patron
b. : something serving or designed to protect
: a device used to prevent injury
: guard
< the chest protector of the baseball catcher — J.H.Shaw >2. : one having the care of the kingdom (as during the king's minority)
: regent
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surge protector
, or
check protector
, or
edge protector