'Underside' definitions:
Definition of 'underside'
From: WordNet
noun
The lower side of anything [syn: bottom, underside, undersurface]
Definition of 'Underside'
From: GCIDE
- Underside \Un"der*side`\, n. The lower or lowest side of anything. --Paley. [1913 Webster]
Synonyms of 'underside'
From: Moby Thesaurus
- bed,
- bedrock,
- belly,
- bottom,
- bottom side,
- breech,
- buttocks,
- downside,
- fundament,
- hardpan,
- lower side,
- lowest layer,
- lowest level,
- nether side,
- nethermost level,
- rock bottom,
- sole,
- substratum,
- underbelly,
- underlayer,
- underneath