Cheer  —n. 1 shout of encouragement or applause. 2 mood, disposition (full of good cheer). 3 (in pl.; as int.) Colloq. A expressing good wishes on parting or before drinking. B expressing gratitude. —v. 1 a applaud with shouts. B (usu. Foll. By on) urge with shouts. 2 shout for joy. 3 gladden; comfort.  cheer up make or become less depressed. [latin cara face, from greek]