adj, noun ·Uncommon ·Advanced level

Definitions

Noun

1. 1
   Something that supplements or adds to.
2. 2
   A requisition or article of legislation that provides additional funding for a program.

Adjective

1. 1
   Acting to supplement.

   "The supplementary bibliography (in Vol. VI) attests to the comprehensiveness of the effort."

2. 2
   Appending.
3. 3
   Lacking a regular schedule (as in a supplemental airline).

Adjective

1. 1
   added to complete or make up a deficiency wordnet
2. 2
   functioning in a supporting capacity wordnet

Synonyms

All synonyms

accessoryaccidentaladditionaladditionaladventitiousalien

Example

More examples

"Good personal investments may provide supplemental income in retirement."

Etymology

From supplement + -al.

Related phrases

supplemental jurisdictionsupplemental restraint system

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.