Supplement1. (v. t.) That which supplies a deficiency, or meets a want; a store; a supply.
2. (v. t.) That which fills up, completes, or makes an addition to, something already organized, arranged, or set apart; specifically, a part added to, or issued as a continuation of, a book or paper, to make good its deficiencies or correct its errors.
3. (n.) The number of degrees which, if added to a specified arc, make it 180; the quantity by which an arc or an angle falls short of 180 degrees, or an arc falls short of a semicircle.
4. (v. t.) To fill up or supply by addition; to add something to.
Thesaurus Entries
PS, Parthian shot, accession, accessory, accident, accidental, accompaniment, add to, addenda, addendum, additament, addition, additive, additory, additum, adjunct, adjuvant, afterthought, annex, annexation, appanage, appendage, appendant, appendix, appurtenance, appurtenant, attachment, augment, augmentation, auxiliary, back matter, chorus, coda, codicil, collateral, colophon, complement, conclusion, concomitant, consequence, contingency, contingent, continuance, continuation, corollary, double take, dying words, envoi, epilogue, extend, extension, extra, extrapolation, fixture, follow-through, follow-up, fortify, happenstance, incidental, increase, increment, inessential, insert, last words, mere chance, nonessential, not-self, offshoot, other, parting shot, pendant, peroration, postface, postfix, postlude, postscript, recruit, refrain, reinforce, reinforcement, rider, second thought, secondary, sequel, sequela, sequelae, sequelant, sequent, sequitur, side effect, side issue, strengthen, subscript, subsidiary, suffix, superaddition, supplementation, swan song, tag, tailpiece, undergirding, unessential