Meaning of portcullis

port•cul•lis

Pronunciation: (pôrt-kul'is, pōrt-), [key]
— n.
  1. (esp. in medieval castles) a strong grating, as of iron, made to slide along vertical grooves at the sides of a gateway of a fortified place and let down to prevent passage.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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