- Continually occurring; persistent.
- Regularly recurring: plagued by constant interruptions.
- Unchanging in nature, value, or extent; invariable. See synonyms at continual.
- Steadfast in purpose, loyalty, or affection; faithful. See synonyms at faithful.
- Something that is unchanging or invariable.
- A quantity assumed to have a fixed value in a specified mathematical context.
- An experimental or theoretical condition, factor, or quantity that does not vary or that is regarded as invariant in specified circumstances.
[Middle English, from Old French, from Latin cōnstāns, cōnstant-, present participle of cōnstāre, to stand firm : com-, intensive pref.; see com– + stāre, to stand.]
constantly con'stant·ly adv.


