1
to go to bed;to go to sleep;to fall asleep
私は１０時ごろ寝ついた。
I went to sleep about 10 o'clock.
2
to be laid up (with a cold);to be ill in bed
父はまだ病気で寝ついている。
My father is still ill in bed.
Other forms
寝つく 【ねつく】 (search-only kanji form)