addendum

1 a part added at the end of a book or periodical there's an addendum from the author to explain certain stylistic choices that she made Synonyms afterword, appendix, codicil, excursus, supplement Related Words coda, epilogue (also epilog), postlude; conclusion, ending, finale; accompaniment, addition, complement, postscript; follow-up, sequel; documentation; allonge, rider Antonyms foreword, introduction, preface, prologue (also prolog)

2 something added (as by growth) with each new addendum the list of demands simply got more absurd Synonyms accretion, accrual, increase, addition, augmentation, boost, expansion, gain, increment, more, plus, proliferation, raise, rise, step-up, supplement, uptickRelated Words accumulation, assemblage, collection, gathering; complement; accession, appendix, continuation, extension, uptrend, upturn; jump, run-up, spikeNear Antonyms deduction, subtractionAntonyms abatement, decline, decrease, decrement, depletion, diminishment, diminution, drop-off, fall, falloff, lessening, loss, lowering, reduction, shrinkage, step-down