'Unilateral contract' definitions:

Definition of 'unilateral contract'

(from WordNet)
noun
A one-sided agreement whereby you promise to do (or refrain from doing) something in return for a performance (not a promise)

Definition of 'Unilateral contract'

From: GCIDE
  • Unilateral \U`ni*lat"er*al\, a. [Uni- + lateral: cf. F. unilat['e]ral.]
  • 1. Being on one side only; affecting but one side; one-sided. [1913 Webster]
  • 2. (Biol.) Pertaining to one side; one-sided; as, a unilateral raceme, in which the flowers grow only on one side of a common axis, or are all turned to one side. [1913 Webster]
  • Unilateral contract (Law), a contract or engagement requiring future action only by one party. [1913 Webster]