1. crossbar - Noun
2. crossbar - Verb
A transverse bar or piece, as a bar across a door, or as the iron bar or stock which passes through the shank of an anchor to insure its turning fluke down.
Source: Webster's dictionaryA crossbar switch has multiple input and output lines that form a crossed pattern of interconnecting lines between which a connection may be established by closing a switch located at each intersection, the elements of the matrix. Source: Internet
A crossbar switching system is also called a coordinate switching system. Source: Internet
Also used was the Tironian note (a character similar to the digit 7) for the conjunction and, and a thorn with a crossbar through the ascender for the pronoun þæt main. Source: Internet
A marker-controlled crossbar system had in the marker a highly vulnerable central control; this was invariably protected by having duplicate markers. Source: Internet
After the Flyers opened the scoring early in the first period, Montreal centre Jesperi Kotkaniemi hit the crossbar 30 seconds into the third -- the fifth time the Canadiens found iron in just over 40 minutes. Source: Internet
A second set of vertical "hold" bars is set at right angles to the first (hence the name, "crossbar") and also operated by electromagnets. Source: Internet