How could you miss this glaring error? It's right on page one!
verb
present participle and gerund of glare
noun
The act of giving a glare.
(rare) A group of cats.
2010, Chuck Lorre et al., The Big Bang Theory, episode “The Zazzy Substitution”
Leonard: You’re clearly upset about Amy being gone, and you’re trying to replace her with a bunch of cats.
Sheldon: Clowder.
Leonard: What?
Sheldon: A group of cats is a clowder. Or a glaring. It’s the kind of thing you ought to know now that we have one.