Playing the guitar

• Playing chords, say
• Ukulele activity

Wiktionary Word definitions in Wiktionary
n. The action of the verb ''to strum'' vb. (present participle of strum English)

WordNet Word definitions in WordNet
See strum

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Strum \Strum\, v. t. & i. [imp. & p. p. Strummed ; p. pr. & vb. n. Strumming .] [Probably of imitative origin. Cf. Thrum .] To play on an instrument of music, or as on an instrument, in an unskillful or noisy way; to thrum; as, to strum a piano.