Main Entry: ¹sup·ple·ment

Pronunciation: \ˈsə-plə-mənt\

Function: noun

Etymology: Middle English, from Latin supplementum, from supplēre to fill up, complete — more at supply

Date: 14th century

1 a : something that completes or makes an addition b : dietary supplement
2 : a part added to or issued as a continuation of a book or periodical to correct errors or make additions
3 : an angle or arc that when added to a given angle or arc equals 180°