POSTMERIDIAN

postmeridian. Postmeridian, a. being or done in the afternoon

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Post′me‐rid″i‐an (?), a. [[L. postmeridianus; post after + meridianus. See Meridian.]] 1. 1. Coming after the sun has passed the meridian; being in, or belonging to, the afternoon. (Abbrev. P. M.)
2. 2. Fig., belonging to the after portion of life; late.