supplementary

supplement + -ary

Adjective

Positive supplementary

Comparative more supplementary

Superlative most supplementary

1. If something is supplementary, it is added on; it is not needed, but it is often useful.
   • Synonyms: additional and extra
   • Antonyms: basic and integral

   Many immigrants are employed but also feel the need to seek supplementary income.

   These software solutions are more supplementary than basic.

Related words

• supplement
• supplementation