What does "robber" mean?

Robber: 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. 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.

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