Be·tray v. t. [imp. & p. p. Betrayed p. pr. & vb. n. Betraying.]
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.
adj : revealing unintentionally; "a betraying blush spread over