Wiktionary
vb. to fall asleep unintentionally
WordNet
v. change from a waking to a sleeping state; "he always falls asleep during lectures" [syn: fall asleep, dope off, flake out, drift off, nod off, drop off, drowse off] [ant: wake up]
Usage examples of "doze off".
I'd sit there and read a book or a magazine, and lots of night I'd doze off.
A long, uncertain time passed after she left, but for a change he did not doze off.
He rested on a couch his soldiers had dragged out into the center of camp so that he could lie closebut not too closebeside his cap tured griffin and talk to it, when he didn't doze off.
If you do manage to doze off, someone shouting out in a dream wakes you.
She hadn't meant to doze off, knowing that something moved in the darkness with her, but the lingering effect of the poison had swallowed her.
She started to doze off again in spite of her worsening thirst and throbbing arms.