Wiktionary
x's
n. (plural of x English)
Usage examples of "x's".
He apparently had it crosslinked to a copy of the script, because as she sidestepped her way down the narrow aisle, she could hear voices rather mechanically reading lines, and as she came closer she could see the little X's and 0's representing the actors moving around on the diagram of the stage that Carl had sketched out.
The place was done up like an ancient London publican house circa World War II, complete with fake bomb damage to one corner of the structure and taped X's over each windowpane-which only made Hackworth think of Dr.
Corporal Z had been X's jeep partner and constant companion from D Day straight through five campaigns of the war.