stabilityn.[L. stabilitas; cf. F. stabilit. See Stable, a.]1. The state or quality of being stable, or firm; steadiness; stableness; firmness; strength to stand without being moved or overthrown; as, the stability of a structure; the stability of a throne or a constitution.()2. Steadiness or firmness of character; firmness of resolution or purpose; the quality opposite to fickleness, irresolution, or inconstancy; constancy; steadfastness; as, a man of little stability, or of unusual stability.()3. Fixedness; -- as opposed to fluidity.()Since fluidness and stability are contrary qualities. (Boyle.)()