An exercise in which the abdominal muscles are contracted, bringing the torso of a person lying down to a more upright position.

Alternative spelling of sit-up

(intransitive) To assume a sitting position from a position lying down. / (intransitive) To sit erect. / (intransitive) To show sudden interest or surprise.

To stay awake past one's usual time in order to care for one or keep one company. / To remain with an individual through the night, especially with an ill or troubled person.

Third-person singular simple present indicative form of sit up

present participle of sit up

plural of sit-up

plural of sit up

present participle of sit up with

Third-person singular simple present indicative form of sit up with