Noun
A form of expansion joint used in street mains of steam-heating systems.
(squash, racquetball) One of two sections of the court, inside which a server must have at least one foot during the service
Source: en.wiktionary.orgA fault is a serve that falls long or wide of the service box, or does not clear the net. Source: Internet
Also, the server must wait until the ball passes the short line before stepping out of the service box, otherwise it is a fault serve. Source: Internet
For a legal serve, one of the server's feet must be touching the service box, not touching any part of the service box lines, as the player strikes the ball. Source: Internet
The "service box" is formed by the short line (a solid red line running the court's width parallel to the front and back walls at a distance of 20 feet) and the service line (which runs parallel to the short line and is 15 feet from the front wall). Source: Internet
In a legal service, the ball travels over the net (without touching it) and into the diagonally opposite service box. Source: Internet
This player starts the first rally by electing to serve from either the left or right service box. Source: Internet