Overcast — Defs

01 v. t. To cast or cover over; hence, to cloud; to darken.

1.
To cast or cover over; hence, to cloud; to darken.
“Those clouds that overcast your morn shall fly.” — Dryden.
2.
To compute or rate too high.
3.
To take long, loose stitches over (the raw edges of a seam) to prevent raveling.(Sewing)
4.
To fasten, as single sheets, by overcast stitching or by folding one edge over another.(Bookbinding)

02 a. Completely or almost completely covered over with clouds; -- of the sky.

1.
Completely or almost completely covered over with clouds; -- of the sky.(Meteorology)
2.
Sewn by overcasting.(Sewing)