Aigrette (A'-Gret Or A-Gret), A French word used to denote the plume or feathery tuft on the heads of several varieties of birds, as the heron. Hence the term came to be used to designate the long, delicate, white feathers which being stuck upright in a lady's head-dress, are calculated to give a majestic appearance to the person. More recently the usage has been still further extended, and any head-dress bearing a similarity to a plume, even a bouquet of flowers fastened with a brooch, is termed an aigrette.