present participle of sign in

simple past tense and past participle of sign in

Something to be suspicious of.

To attend a private meeting or class without participating.

(baseball, of a pitcher) Having more strikes than balls against a batter in an at-bat. / (baseball, of a batter) Having fewer strikes than balls against a pitcher in an at-bat.

(baseball, of a pitcher) Having fewer strikes than balls against a batter in an at-bat. / (baseball, of a batter) Having more strikes than balls against a pitcher in an at-bat.

(nonstandard) plural of sister-in-law

Alternative spelling of needle in a haystack

(informal) To annoy someone. / (informal) To hinder someone or interfere with their actions.

Related through marriage.