2 definitions found From WordNet (r) 2.0 [wn]: obsolescent adjective: becoming obsolete From The Collaborative International Dictionary of English v.0.44 [gcide]: Obsolescent \Ob'so*les"cent\, adjective [L. obsolescens, -entis, p. pr. of obsolescere, to wear out gradually, to fall into disuse; ob (see {Ob-}) + solere to use, be wont.] Going out of use; becoming obsolete; passing into desuetude.

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