verb (used with object), un·der·fed, un·der·feed·ing.
- to feed insufficiently.
- to feed with fuel from beneath.
verb (ˌʌndəˈfiːd) -feeds, -feeding or -fed (tr)
- to give too little food to
- to supply (a furnace, engine, etc) with fuel from beneath
- an apparatus by which fuel, etc, is supplied from below