Fully extended in width:
— Outspread wings.

synoniem: spread.

Roget 202: broad, wide, ample, extended; discous^†; fanlike; outspread, outstretched; wide as a church-door" [Romeo and Juliet]; latifoliate^†, latifolous^†.    thick, dumpy, squab, squat, thickset; thick as a rope.    ... meer laten zien