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Definition of Baseline
1. Noun. An imaginary line or standard by which things are measured or compared. "The established a baseline for the budget"
2. Noun. The back line bounding each end of a tennis or handball court; when serving the server must not step over this line.
3. Noun. The lines a baseball player must follow while running the bases.
Generic synonyms: Line
Definition of Baseline
1. a line at either end of a court in certain sports [n -S]
Medical Definition of Baseline
1.