Definition of "sit up" []

• Alternative spelling of sit-up; alternative spelling of situp. (noun)
• To assume a sitting position from a position lying down. (verb)
• To sit erect. (verb)
• To show interest or surprise. (verb)
• To rise. (verb)

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• "It was her half-hooked garter, but the pop of it made her sit up straight, fists clenched in the thin fabric of her skirt."
• "“At least I have a woman willing to throw up on me; whereas you, Killkenny, have to sit up on a knoll in the dark to be near yours.”"
• "These days, EMC Corporation is a bit more familiar—when your stock rises by 80,575 percent in a decade, people tend to sit up and take notice."