Harp \Harp\, v. i. [imp. & p. p. Harped (h[aum]rpt) p. pr. & vb. n. Harping.]

[AS. hearpian. See Harp, n.]

1. To play on the harp. [1913 Webster]

I heard the voice of harpers, harping with their harps. --Rev. xiv. 2. [1913 Webster]

2. To dwell on or recur to a subject tediously or monotonously in speaking or in writing; to refer to something repeatedly or continually; -- usually with on or upon. "Harpings upon old themes." --W. Irving. [1913 Webster]

Harping on what I am, Not what he knew I was. --Shak. [1913 Webster]

To harp on one string, to dwell upon one subject with disagreeable or wearisome persistence. [Colloq.]

[1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Harp \Harp\, v. i. [imp. & p. p. Harpedp. pr. & vb. n. Harping.]

[AS. hearpian. See Harp, n.]

1. To play on the harp.

I heard the voice of harpers, harping with their harps. --Rev. xiv. 2.

2. To dwell on or recur to a subject tediously or monotonously in speaking or in writing; to refer to something repeatedly or continually; -- usually with on or upon. ``Harpings upon old themes.'' --W. Irving.

Harping on what I am, Not what he knew I was. --Shak.

To harp on one string, to dwell upon one subject with disagreeable or wearisome persistence. [Collog.]

Source: Webster's Revised Unabridged Dictionary (1913)