The sill is freezing in the winter and stultifyingly hot in the summer.
We stood in the open doors with one foot resting on the sill and an elbow cocked on the roof, looking cool.
Another journalist begged him to do a sill walk live on stage then and there, but he demurred.
He flung a leg over the sill and drew himself gently into the room.
Under this stone, or under this sill, Or under this turf, &c.
Later, two bright stars close together appeared through the open doorway about a foot above the sill.
The sill was not high from the ground, and the boys ventured to peep in.
It was futile, of course, but this time it seemed to him that the sill and the plank to which it was attached gave a little.
She was sitting on the sill of the window across from Lucy Knox.
Von Eitelwurmer, leaning over the sill of the large scuttle, peered downwards.
Old English syll "beam, threshold, large timber serving as a foundation of a wall," from Proto-Germanic *suljo (cf. Old Norse svill, Swedish syll, Danish syld "framework of a building," Middle Low German sull, Old High German swelli, German Schwelle "sill"), perhaps from PIE root *swel- (3) "post, board" (cf. Greek selma "beam"). Meaning "lower horizontal part of a window opening" is recorded from early 15c.
A sheet of igneous rock intruded between layers of older rock. See illustration at batholith.