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

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

Alternative spelling of sit-up

(intransitive) To assume a sitting position from a standing position. / (transitive or reflexive) To cause to be seated or in a sitting posture; to furnish a seat to.

(transitive, intransitive) To decline to participate; particularly, to decline to dance. / (transitive) To await the cessation of, without taking part.

Alternative form of sitout / Alternative form of sit-out

Alternative spelling of babysit

(idiomatic) To wait patiently; to take no action; to remain quiet or relatively motionless.

present participle of baby-sit

Alternative spelling of babysitting