definition of
[warn]

[1] #1 warn v. 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". wn

[2] #2 warn v. [discourage, admonish, monish] 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". wn

[3] #3 warn v. ask to go away; "The old man warned the children off his property". wn

[4] #4 warn v. notify, usually in advance; "I warned you that I would ask some difficult questions". wn