The Collaborative International Dictionary of English v.0.48:

Regale \Re*ga"le\ (r?*g?"l?), n. [LL. regale, pl. regalia, fr.
   L. regalis: cf. F. r['e]gale. See Regal.]
   A prerogative of royalty. [R.] --Johnson.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Regale \Re*gale"\ (r?*g?l), v. t. [imp. & p. p. Regaled
   (-g?ld"); p. pr. & vb. n. Regaling.] [F. r['e]galer, Sp.
   regalar to regale, to caress, to melt, perhaps fr. L.
   regalare to thaw (cff. Gelatin), or cf. Sp. gala graceful,
   pleasing address, choicest part of a thing (cf. Gala), or
   most likely from OF. galer to rejoice, gale pleasure.]
   To enerta?n in a regal or sumptuous manner; to enrtertain
   with something that delights; to gratify; to refresh; as, to
   regale the taste, the eye, or the ear.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Regale \Re*gale"\, v. i.
   To feast; t? fare sumtuously.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Regale \Re*gale"\, n. [F. r['e]gal. See Regale, v. t.]
   A sumptuous repast; a banquet. --Johnson. Cowper.
   [1913 Webster]

         Two baked custards were produced as additions to the
         regale.                                  --E. E. Hale.
   [1913 Webster]

WordNet (r) 3.0 (2006):

regale
    v 1: provide with choice or abundant food or drink; "Don't worry
         about the expensive wine--I'm treating"; "She treated her
         houseguests with good food every night" [syn: regale,
         treat]

Moby Thesaurus II by Grady Ward, 1.0:

88 Moby Thesaurus words for "regale":
   allay, amuse, animate, appease, assuage, banquet, beguile, bewitch,
   board, brace, brace up, bread, brisk, brisken, buck up, captivate,
   charm, cheer, chirk up, convulse, delight, dine, divert,
   do justice to, eat heartily, eat up, enchant, enliven, enrapture,
   entertain, entrance, exhilarate, fascinate, feast, feed, fodder,
   forage, fortify, fracture one, fresh up, freshen, freshen up,
   grass, gratify, graze, indulge, invigorate, kill, knock dead,
   loosen up, meat, mess, pasture, perk up, pick up, please,
   polish the platter, provision, put it away, quench, quicken,
   raise a laugh, raise a smile, reanimate, recreate, refresh,
   refreshen, reinvigorate, relax, renew, revive, revivify, sate,
   satiate, satisfy, set up, slake, slay, solace, spellbind, spread,
   stimulate, sustain, tickle, titillate, vivify, wine and dine,
   wow