noun. A bridge that can be raised or drawn aside either to prevent access or to permit passage beneath it.

noun. A bridge which may be drawn up or let down to admit or hinder communication, or to leave a transverse passage free, as before the gate of a town or castle, or over a navigable river. Formerly also called draught-bridge and draught. See draft.

noun. A bridge one or more sections of which can be lifted or moved aside to permit the passage of boats.

noun. 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.

noun. A hinged bridge which can be raised (to prevent its being crossed, as across a moat, or to allow watercraft to travel beneath it).

noun. a bridge that can be raised to block passage or to allow boats or ships to pass beneath it

"The time it takes to operate the drawbridge is a significant fraction of the headways of the BRT service proposed to run on the bridge."

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