Whisper \Whis"per\, v. i. [imp. & p. p. Whispered; p. pr. & vb. n. Whispering.]

[AS. hwisprian; akin to G. wispern, wispeln, OHG. hwispal?n, Icel. hv[=i]skra, Sw. hviska, Dan. hviske; of imitative origin. Cf. Whistle.]

1. To speak softly, or under the breath, so as to be heard only by one near at hand; to utter words without sonant breath; to talk without that vibration in the larynx which gives sonorous, or vocal, sound. See Whisper, n.

2. To make a low, sibilant sound or noise.

The hollow, whispering breeze. --Thomson.

3. To speak with suspicion, or timorous caution; to converse in whispers, as in secret plotting.

All that hate me whisper together against me. --Ps. xli. 7.

Source: Webster's Revised Unabridged Dictionary (1913)