Betray word meaning and definition

[verb] give away information about somebody; "He told on his classmate who had cheated on the exam"
[verb] cause someone to believe an untruth; "The insurance company deceived me when they told me they were covering my house"
[verb] reveal unintentionally; "Her smile betrayed her true feelings"
[verb] 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"
[verb] deliver to an enemy by treachery; "Judas sold Jesus"; "The spy betrayed his country"
[verb] be sexually unfaithful to one's partner in marriage; "She cheats on her husband"; "Might her husband be wandering?"

\Be*tray"\ (b[-e]*tr[=a]"), v. t. [imp. & p. p. {Betrayed} (-tr[=a]d"); p. pr. & vb. n. {Betraying}.] [OE. betraien, bitraien; pref. be- + OF. tra["i]r to betray, F. trahir, fr. L. tradere. See {Traitor}.] 1. To deliver into the hands of an enemy by treachery or fraud, in violation of trust; to give up treacherously or faithlessly; as, an officer betrayed the city. Jesus said unto them, The Son of man shall be betrayed into the hands of men. --Matt. xvii. 22. 2. To prove faithless or treacherous to, as to a trust or one who trusts; to be false to; to deceive; as, to betray a person or a cause. But when I rise, I shall find my legs betraying me. --Johnson. 3. To violate the confidence of, by disclosing a secret, or that which one is bound in honor not to make known. Willing to serve or betray any government for hire. --Macaulay. 4. To disclose or discover, as something which prudence would conceal; to reveal unintentionally. Be swift to hear, but cautious of your tongue, lest you betray your ignorance. --T. Watts. 5. To mislead; to expose to inconvenience not foreseen to lead into error or sin. Genius . . . often betrays itself into great errors. --T. Watts. 6. To lead astray, as a maiden; to seduce (as under promise of marriage) and then abandon. 7. To show or to indicate; -- said of what is not obvious at first, or would otherwise be concealed. All the names in the country betray great antiquity. --Bryant.

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