The Collaborative International Dictionary of English v.0.48:

force-feed \force-feed\ v. t.
   to feed (someone) against his will, as during a hunger
   strike.
   [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

force-feed \force-feed\ n.
   a method of lubricating internal combustion engines in which
   a pump forces oil into the engine bearings.

   Syn: lubricating system, force-feed lubricating system, force
        feed, pressure-feed lubricating system, pressure feed.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

force-feed
    v 1: feed someone who will not or cannot eat