(slang) group sex involving two or more sisters (female siblings of each other) with one or more men.

(civil law, South Africa) Any conduct by a person intended to create, modify, transfer, preserve, or extinguish a right, obligation, or legal relationship.

Having been acted out; having been performed or enacted.

(Australia) The middle of three levels of alert issued by government authorities in response to a bushfire, indicating that the danger is approaching and residents need to take action.

taking effect quickly

superlative form of fast-acting: most fast-acting

comparative form of fast-acting: more fast-acting

comparative form of slow-acting: more slow-acting

superlative form of slow-acting: most slow-acting

taking effect slowly, not immediately