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. (Science: biology) Not very distinct; obscure; rudimental; imperfectly developed; abortive.

Synonym: ancient, antiquated, old-fashioned, antique, old, disused, neglected. See ancient.

Origin: L. Obsoletus, p.p. Of obsolescere. See Obsolescent. Outdated or superceded.

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