| RIS | a vertical pipe in a building |
|---|---|
| RIS | a vertical pipe in a building |
| RIS | a vertical pipe in a building |
| RIS | a disposition to laugh |
| RIS | arousing or provoking laughter |
| RIS | organized opposition to authority |
| RIS | a movement upward |
| RIS | newly come into prominence |
| RIS | coming to maturity |
| RIS | sloping upward |
| RIS | (of a heavenly body) becoming visible above the horizon |
| RIS | advancing or becoming higher or greater in degree or value or status |