The Collaborative International Dictionary of English v.0.48:
Hint \Hint\, v. i. To make an indirect reference, suggestion, or allusion; to allude vaguely to something. [1913 Webster] We whisper, and hint, and chuckle. --Tennyson. [1913 Webster] To hint at, to allude to lightly, indirectly, or cautiously. Syn: To allude; refer; glance; touch. [1913 Webster]