Entry 1 sense Webster, 1913 Picaroon · Pic·a·roon · IPA /ˌpɪkəˈɹuːn/ 01 n. One who plunders; especially, a plunderer of wrecks; a pirate; a corsair; a marauder; a sharper. 1. One who plunders; especially, a plunderer of wrecks; a pirate; a corsair; a marauder; a sharper.