1) After noon 2) Post meridiem 1) Pm 
• (a.) Coming after the sun has passed the meridian; being in, or belonging to, the afternoon. (Abbrev. P. M.) • (a.) Fig., belonging to the after portion of life; late.
Post`me·rid'i·an adjective [ Latin postmeridianus ; post after + meridianus . See Meridian .] 1. Coming after the sun has passed the meridian; being in, or belonging to, the afternoon. (Abbrev. P. M. ) 2. Fig., belonging to the after portion of li...
[adj] - after noon
postmeridian The etymologicl development of media and medium.postmeridian, postmeridiem (P.M.) 1. Occurring after noon or midday; of or pertaining to the afternoon. 2. After midday; applied to the hours between noon and midnight; usually abbreviated pm or p.m.
adjective after noon