Definition of harp on
: to talk about (a subject) constantly or repeatedly in an annoying way She's always harping on the importance of a good diet. He seems to enjoy harping on my shortcomings.
Word by Word Definitions
: a plucked stringed instrument consisting of a resonator, an arched or angled neck that may be supported by a post, and strings of graded length that are perpendicular to the soundboard
: something resembling a harp
: to play on a harp
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