1. a soft bag of cloth, leather, or rubber, filled with feathers, air, foam rubber, etc., on which to sit, kneel, or lie.
2. anything similar in form, used to dampen shocks or to prevent excessive pressure or chafing.
3. something to absorb or counteract a shock, jar, or jolt, as a body of air or steam.
4. something that lessens the effects of hardship, distress, or the like: His inheritance was a cushion against unemployment.
5. Anatomy, Zoology . any part or structure resembling a cushion.