ˌəndə(r)ˈstandə(r), -aan- noun
( -s )
Etymology: Middle English understander, understonder, from understanden, understonden + -er
1. : one that understands
2. : one that stands under or supports ; specifically : underman 2
3. obsolete
a. : foot
b. : boot
4. obsolete : a spectator in the pit of a theater