I. harp¹ /hɑːp $ hɑːrp/ noun [countable]
[Language: Old English; Origin: hearpe]
a large musical instrument with strings that are stretched across a vertical frame with three corners, and that you play with your fingers
—harpist noun [countable]

[TahlilGaran] Dictionary of Contemporary English ▲

II. harp² verb
harp on about something British English, harp on something American English phrasal verb informal
to talk about something continuously, especially in a way that is annoying or boring:
My grandfather harps on about the war all the time.

[TahlilGaran] Dictionary of Contemporary English ▲

harp
noun
VERB + HARP set, tune By means of pedals, a harp can be set in any desired key.
 ⇒ Special page at MUSIC

[TahlilGaran] Collocations Dictionary ▲

harp
verb PHRASAL VERBS harp on
ADV. always, constantly He is always harping on about the war.
still
PREP. about
PHRASES keep harping on Don't keep harping on about my age!

[TahlilGaran] Collocations Dictionary ▲