The Collaborative International Dictionary of English v.0.48:
Prelude \Pre*lude"\, v. i. [imp. & p. p. Preluded; p. pr. &
vb. n. Preluding.] [L. praeludere, praelusum; prae before +
ludere to play: cf. F. pr['e]luder. See Ludicrous.]
To play an introduction or prelude; to give a prefatory
performance; to serve as prelude.
The musicians preluded on their instruments. --Sir. W.
We are preluding too largely, and must come at once to
the point. --Jeffrey.