'complementation' definitions:

Definition of 'complementation'

From: WordNet
noun
The grammatical relation of a word or phrase to a predicate
noun
(linguistics) a distribution of related speech sounds or forms in such a way that they only appear in different contexts [syn: complementary distribution, complementation]

Definition of 'complementation'

From: GCIDE
  • complementation \complementation\ n. (Linguistics) the grammatical relation of a word or phrase to a predicate. [WordNet 1.5]