'Drawbridge' definitions:

Definition of 'drawbridge'

From: WordNet
noun
A bridge that can be raised to block passage or to allow boats or ships to pass beneath it [syn: drawbridge, lift bridge]

Definition of 'Drawbridge'

From: GCIDE
  • Drawbridge \Draw"bridge`\, n. A bridge of which either the whole or a part is made to be raised up, let down, or drawn or turned aside, to admit or hinder communication at pleasure, as before the gate of a town or castle, or over a navigable river or canal. [1913 Webster]
  • Note: The movable portion, or draw, is called, specifically, a bascule, balance, or lifting bridge, a turning, swivel, or swing bridge, or a rolling bridge, according as it turns on a hinge vertically, or on a pivot horizontally, or is pushed on rollers. [1913 Webster]