- not constant; changeable; fickle; variable: an inconstant friend.
- not constant; variable
1520s, from Latin inconstantia (see inconstance).
c.1400, “fickle, not steadfast,” from Middle French inconstant (late 14c.), from Latin inconstantem (nominative inconstans) “changeable, fickle, capricious,” from in- “not, opposite of, without” (see in- (1)) + constantem (see constant). Related: Inconstantly.
- Changing or varying, especially often and without discernible pattern or reason.
- Relating to a structure that normally may or may not be present.