adj.
Pronunciation: ˌ sü-p ə r-i- ' rä-g ə - ˌ to ̇ r- ē
Function: adjective
Date: 1593
1 : observed or performed to an extent not enjoined or required
2 : exceeding what is needed : SUPERFLUOUS <attending three long-winded meetings in a row on the same subject was supererogatory >