Definition of harp onUS, informal
- She's always harping on the importance of a good diet.
- He seems to enjoy harping on my shortcomings.
: 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
: to dwell on or recur to a subject tiresomely or monotonously
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