'Warn' definitions:

Definition of 'warn'

From: WordNet
verb
Notify of danger, potential harm, or risk; "The director warned him that he might be fired"; "The doctor warned me about the dangers of smoking"
verb
Admonish or counsel in terms of someone's behavior; "I warned him not to go too far"; "I warn you against false assumptions"; "She warned him to be quiet" [syn: warn, discourage, admonish, monish]
verb
Ask to go away; "The old man warned the children off his property"
verb
Notify, usually in advance; "I warned you that I would ask some difficult questions"

Definition of 'Warn'

From: GCIDE
  • Warn \Warn\ (w[add]rn), v. t. [OE. wernen, AS. weornan, wyrnan. Cf. Warn to admonish.] To refuse. [Written also wern, worn.] [Obs.] --Chaucer. [1913 Webster]

Definition of 'Warn'

From: GCIDE
  • Warn \Warn\, v. t. [imp. & p. p. Warned; p. pr. & vb. n. Warning.] [OE. warnen, warnien, AS. warnian, wearnian, to take heed, to warn; akin to AS. wearn denial, refusal, OS. warning, wernian, to refuse, OHG. warnen, G. warnen to warn, OFries. warna, werna, Icel. varna to refuse; and probably to E. wary. ????.] [1913 Webster]
  • 1. To make ware or aware; to give previous information to; to give notice to; to notify; to admonish; hence, to notify or summon by authority; as, to warn a town meeting; to warn a tenant to quit a house. "Warned of the ensuing fight." --Dryden. [1913 Webster]
  • Cornelius the centurion . . . was warned from God by an holy angel to send for thee. --Acts x. 22. [1913 Webster]
  • Who is it that hath warned us to the walls? --Shak. [1913 Webster]
  • 2. To give notice to, of approaching or probable danger or evil; to caution against anything that may prove injurious. "Juturna warns the Daunian chief of Lausus' danger, urging swift relief." --Dryden. [1913 Webster]
  • 3. To ward off. [Obs.] --Spenser. [1913 Webster]

Synonyms of 'warn'

From: Moby Thesaurus