Wiktionary
vb. 1 Accompany a guest when he or she leaves. 2 Continue something until completion.
Usage examples of "see out".
The pile of things he'd bought got bigger and bigger as they were placed around him until he could hardly see out.
He stood on the side of a mountain, and could see out over the trees below.
Too still, too close for her to see out of that eye at that angle.
At last, with my pillows so arranged that I could see out comfortably, and with the unhygienic-looking blanket turned back - I have always a distrust of those much-used affairs - I prepared to wait gradually for sleep.
She thought of relighting one of the candles, to keep the shadows at bay, but the unsteady flame reflected off the window pane and made it even harder for her to see out.
I had purposefully turned the seat away from one of the many round windows so I couldn't see out the side nearest me.
Nonetheless what Adele could see out the side window was impressive enough.