Wordnet 3.0
ADVERB (1)
1.
in an idiomatic manner;
- Example: "he expressed himself idiomatically"
The Collaborative International Dictionary of English v.0.48:
Idiomatic \Id`i*o*mat"ic\, Idiomatical \Id`i*o*mat"ic*al\, a.
[Gr. 'idiwmatiko`s.]
1. Of or pertaining to, or conforming to, the mode of
expression peculiar to a language; as, an idiomatic
meaning; an idiomatic phrase. -- Id`i*o*mat"ic*al*ly,
adv.
[1913 Webster]
2. Of or pertaining to, or of the nature of an idiom[3];
having a meaning that is peculiar to itself and not
predictable from general rules.
[PJC]
WordNet (r) 3.0 (2006):
idiomatically
adv 1: in an idiomatic manner; "he expressed himself
idiomatically"