foot fault
/ˈfʊt fɔːlt/
/ˈfʊt fɔːlt/
Etymology
English
From foot + fault. The term appeared in tennis during the late 19th century, when the rules of lawn tennis were formalised and the requirement for servers to stay behind the baseline was codified. It later spread to other court sports such as volleyball and racquetball that adopted similar service-line rules.
First known use
1886
1886, in the meaning defined above