1. An influence that works subtly to lighten or modify something
   "his sermons benefited from a leavening of humour"
   - leaven 
2. A substance used to produce fermentation in dough or a liquid
   - leaven

1. Cause to puff up with a leaven
   - raise, prove

Derived forms: leavenings

Type of: bring up, elevate, get up, imponderable, lift, raise, substance

Encyclopedia: Leaven

• signal light
• signal tower
• signal-to-noise
• signal-to-noise ratio
• signal/noise
• signal/noise ratio
• signaler
• signaling
• signaling device
• signalisation
• signalise
• signalization
• signalize
• signaller
• signalling
• hypnogogic
• hypnoid
• hypnology
• hypnopedia
• hypnophobia
• Hypnos
• hypnosis
• hypnotherapy
• hypnotic
• hypnotic trance