a. | 1. | Not given to variation or change; unalterable; unchangeable; always uniform. |
n. | 1. | (Math.) An invariable quantity; a constant. |
Adj. | 1. | invariable - not liable to or capable of change; "an invariable temperature"; "an invariable rule"; "his invariable courtesy" Antonyms: variable - liable to or capable of change; "rainfall in the tropics is notoriously variable"; "variable winds"; "variable expenses" |