added or supplementary
WordReference Random House Unabridged Dictionary of American English © 2026
ad•di•tion•al
(ə dish′ə nl),USA pronunciation adj.
ad•di′tion•al•ly, adv.
- added;
more;
supplementary:additional information.
- addition + -al1 1630–40
Collins Concise English Dictionary © HarperCollins Publishers::
'additional' also found in these entries (note: many are not synonyms or translations):
AEC
- AP
- Additional Member System
- California job case
- accessory
- add-on
- additory
- addnl.
- adjective
- adscititious
- afterburner
- afterburning
- aftermarket
- again
- agnomen
- airhead
- ale
- amplification
- amplifier
- an
- another
- antiproliferation
- appendix
- ary
- astronomical clock
- attachment
- augmenter
- auxiliary
- bailout
- banyan
- barley
- baryton
- base pay
- base price
- bells and whistles
- besides
- bezique
- bibb
- bonus
- box score
- bracket
- breast drill
- built-in
- bump
- bypass engine
- cambium
- cap
- capture
- challenge
- chicane