WordNet sense 1 (a gentle blow):

strike, tap

WordNet sense 2 (the sound made by a gentle blow):

pat

WordNet sense 3 (genre of African-American music of the 1980s and 1990s in which rhyming lyrics are chanted to a musical accompaniment; several forms of rap have emerged):

hip-hop, rap music

WordNet sense 4 (a reproach for some lapse or misdeed):

blame

WordNet sense 5 (make light, repeated taps on a surface):

knock, pink

WordNet sense 6 (strike sharply):

knap

WordNet sense 7 (the act of hitting vigorously):

belt, whack, whang