mourning cloak mour·ningc·loak uncommon noun 1. of temperate regions; having dark purple wings with yellow borders Synonymsmourning cloakmourning cloak butterflyCamberwell beautyNymphalis antiopa Related words Word family mourning cloak butterfly Broader terms nymphalid Parts Nymphalis WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
