(1):

(n.) The small white European heron. See Egret.

(2):

(n.) A plume or tuft for the head composed of feathers, or of gems, etc.

(3):

(n.) A tuft like that of the egret.

(4):

(n.) A feathery crown of seed; egret; as, the aigrette or down of the dandelion or the thistle.