Whisper is a verb meaning to speak very softly using one's breath rather than one's throat, especially for the sake of secrecy.
As a noun, whisper refers to:
1. A soft or confidential tone of voice
2. A rumor or piece of gossip
3. A slight rustling or murmuring sound
Idioms with whisper:
- In a whisper: very quietly
- It's whispered that...: people are saying that...