supplement

/sˈʌpləmənt/ · 3 syllables

Meaning

noun

1. textual matter that is added onto a publication; usually at the end
2. a quantity added (e.g. to make up for a deficiency)
3. a supplementary component that improves capability

verb

1. add as a supplement to what seems insufficient
   “supplement your diet”
2. serve as a supplement to
   “Vitamins supplemented his meager diet”
3. add to the very end
   “He appended a glossary to his novel where he used an invented language”

Synonyms for supplement

• addendum
• postscript
• supplementation
• accessory
• appurtenance
• add-on
• append
• add on
• affix