Ob″so‐lete (?), a. [L. obsoletus, p. p. of obsolescere. See Obsolescent.] 1. No longer in use; gone into disuse; disused; neglected; as, an obsolete word; an obsolete statute; — applied chiefly to words, writings, or observances.
2. (Biol.) Not very distinct; obscure; rudimental; imperfectly developed; abortive.
Syn. — Ancient; antiquated; old-fashioned; antique; old; disused; neglected. See Ancient.