bn:00008822n
Noun Concept
EN
service line  baseline
EN
The back line bounding each end of a tennis or handball court; when serving the server must not step over this line WordNet 3.0
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EN
The back line bounding each end of a tennis or handball court; when serving the server must not step over this line WordNet 3.0 & Open English WordNet
The line, in tennis and similar sports, from behind which the ball is initially served and which the feet must not cross when serving. Wiktionary
IS A
WordNet 3.0 & Open English WordNet
Wiktionary