definition of
betray

[1] #1 betray v. [bewray] reveal unintentionally; "Her smile betrayed her true feelings". wn

[2] #2 betray v. [sell] deliver to an enemy by treachery; "Judas sold Jesus"; "The spy betrayed his country". wn

[3] #3 betray v. [fail] disappoint, prove undependable to; abandon, forsake; "His sense of smell failed him this time"; "His strength finally failed him"; "His children failed him in the crisis". wn

[4] #4 betray v. [cheat on, cheat, cuckold, wander] be sexually unfaithful to one's partner in marriage; "She cheats on her husband"; "Might her husband be wandering?". wn

[5] #5 betray v. [denounce, tell on, give away, rat, grass, shit, shop, snitch, stag] give away information about somebody; "He told on his classmate who had cheated on the exam". wn