noun Clouds covering a large part of the sky. (the sky was leaden with overcast)
verb Cover with clouds or shade. (the pebbled beach, overcast with the shadows of the high cliffs) Stitch over (an unfinished edge) to prevent fraying. (finish off the raw edge of the hem by overcasting it)
adjective (of the sky or weather) marked by a covering of gray clouds; dull. (a chilly, overcast day) (in sewing) edged with stitching to prevent fraying.