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Meaning of underfeed

un•der•feed

Pronunciation: (un"dur-fēd' for 1 un'der-fēd" for 2), [key]
— -fed, -feed•ing.
  1. to feed insufficiently.
  2. to feed with fuel from beneath.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.