| RIS | (computer science) a kind of computer architecture that has a relatively small set of computer instructions that it can perform |
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| RIS | the act of changing location in an upward direction |
| RIS | increase in price or value |
| RIS | the property possessed by a slope or surface that rises |
| RIS | the amount a salary is increased |
| RIS | an increase in cost |
| RIS | a growth in strength or number or importance |
| RIS | a wave that lifts the surface of the water or ground |
| RIS | a movement upward |
| RIS | an upward slope or grade (as in a road) |
| RIS | get up and out of bed |
| RIS | return from the dead |