An unchanging state, as indicated in a graph of a variable over time.

The absence of heart contractions or brain waves, characterized by the disappearance of rhythmic peaks on a heart monitor and the absence of brain waves on an electroencephalogram.

(intransitive, of the heart) To stop beating.

(intransitive, by extension) To die.

(transitive, slang) To kill.

To stay at the same level, without development; or, to fall.

(of a graph) To experience significantly decreased rates of change compared to previous rates of change.