Noun

1. An inclined surface connecting two levels
2. North american perennial having a slender bulb and whitish flowers
3. A movable staircase that passengers use to board or leave an aircraft

Verb

1. Behave violently, as if in state of a great anger
2. Furnish with a ramp
3. Be rampant
4. Creep up -- used especially of plants
5. Stand with arms or forelegs raised, as if menacing