n. & v.
n. 1 a a preliminary speech, poem, etc., esp. introducing a play (cf. EPILOGUE). b the actor speaking the prologue. 2 (usu. foll. by to) any act or event serving as an introduction.
v.tr. (prologues, prologued, prologuing) introduce with or provide with a prologue.
[ ME prolog f. OF prologue f. L prologus f. Gk prologos (as PRO-(2), logos speech) ]