Wiktionary
catcher's interference
n. (context baseball English) A form of interference in which a catcher intentionally or inadvertently physically hinders a batter from the opportunity to legally swing at a pitched ball, and for which the catcher is charged an error.
Usage examples of "catcher's interference".
Most of us being graduate students, we had no problem coming up with four -- a walk, hit by pitch, dropped third strike, and catcher's interference -- but the fifth, if indeed it exists, remains an unknown.