Robber

Rob"ber (?), n. One who robs; in law, one who feloniously takes goods or money from the person of another by violence or by putting him in fear.

Some roving robber calling to his fellows.
Milton.

Syn. -- Thief; depredator; despoiler; plunderer; pillager; rifler; brigang; freebooter; pirate. See Thief.

Robber crab. (Zoöl.) (a) A purse crab. (b) Any hermit crab. -- Robber fly. (Zoöl.) Same as Hornet fly, under Hornet. -- Robber gull (Zoöl.), a jager gull.