Definition of P.m.

Adjective

• after noon
  - post meridiem

Adverb

• between noon and midnight
  "let's meet at 8 P.M."
  - post meridiem

Word games points for the P.m.

• Scrabble® score of the p.m. (6)
• Word Chums® score of the p.m. (9)
• Words With Friends® score of the p.m. (8)