footfault

English Thesaurus

1. a fault that occurs when the server in tennis fails to keep both feet behind the baseline (noun.act)

hypernym	:	fault,
definition	:	(sports) a serve that is illegal (e.g., that lands outside the prescribed area) (noun.act)

part meronym	:	lawn tennis, tennis,
definition	:	a game played with rackets by two or four players who hit a ball back and forth over a net that divides the court (noun.act)