sit up

Meanings

Verb

• To assume a sitting position from a position lying down.
• To sit erect.
• To show sudden interest or surprise.
• To bounce, especially to a comfortable height.
• To not go to bed (notionally remaining in a sitting position).
• For a young lady to open her house for several successive nights for any visitors who wish to pay their respects.

Noun

• Alternate spelling of sit-up

Origin

• Dissimilated from Middle English upsitten.