I. |səplə|ment ə l adjective
Etymology: supplement (I) + -al
1. : serving to supplement : of the character of a supplement : supplementary
supplemental angle
supplemental appropriations
2. : of, relating to, or being an answer, bill, or plea filed or served in aid of an original one to supply some defect in the latter or to set forth new facts which cannot be added by amendment
• sup·ple·men·tal·ly - ə lē, - ə li adverb
II. noun
( -s )
: a supplementary thing : supplement
supplementals for the civilian agencies totaled more than a billion dollars — U.S. News & World Report