O.K.

名词 o.k.:

1. an endorsement
   同义词：OK, okay, okey, okeh
2. a state in south central United States
   同义词：Oklahoma, Sooner State, OK

动词 o.k.:

1. give sanction to
   同义词：approve, okay, sanction

形容词 o.k.:

1. being satisfactory or in satisfactory condition
   同义词：all right, fine, ok, okay, hunky-dory

副词 o.k.:

1. in a satisfactory or adequate manner; (`alright' is a nonstandard variant of `all right')
   同义词：okay, all right, alright
2. an expression of agreement normally occurring at the beginning of a sentence
   同义词：very well, fine, alright, all right, OK