'Necessarily' definitions:

Definition of 'necessarily'

From: WordNet
adverb
In an essential manner; "such expenses are necessarily incurred" [syn: necessarily, needfully] [ant: unnecessarily]
adverb
In such a manner as could not be otherwise; "it is necessarily so"; "we must needs by objective" [syn: inevitably, necessarily, of necessity, needs]
adverb
As a highly likely consequence; "we are necessarily bound for federalism in Europe"

Definition of 'Necessarily'

From: GCIDE
  • Necessarily \Nec"es*sa*ri*ly\, adv. In a necessary manner; by necessity; unavoidably; indispensably. [1913 Webster]

Synonyms of 'necessarily'

From: Moby Thesaurus