A pattern of lines crossing each other.

Secured by, or furnished with, crossbars. / Made or patterned in lines crossing each other.

plural of crossbar

(transitive) To mark with a pattern of transverse bars.

Any transverse bar or piece, such as a bar across a door, or the iron bar or stock which passes through the shank of an anchor. / (sports) The top of the goal structure.

plural of crossbar switch

(electronics) A matrix of switches with multiple input and output lines that form a crossed pattern between which a connection may be established by closing a switch located at each intersection.

plural of crossbar hotel

(US, slang) jail, prison