- constant (adj.)
- late 14c., "steadfast, resolute," from Old French constant (14c.) or directly from Latin constantem (nominative constans) "standing firm, stable, steadfast, faithful," present participle of constare, from com- "together" (see com-) + stare "to stand," from PIE root *stā- "to stand" (see stet). Of actions and conditions from 1650s. Related: Constantly.
- constant (n.)
- 1832 in mathematics and physics, from constant (adj.).
