(figuratively) To correct insignificant mistakes or find fault in unimportant details. / (archaic, literally) To pick nits (lice eggs) from someone’s hair.

The painstaking process of removing nits (lice eggs) from someone's hair.

simple past tense and past participle of nitpick

Third-person singular simple present indicative form of nitpick

plural of nitpicker

One who nitpicks (finds fault in unimportant details).

plural of nitpicking

Finicky; overly critical; concerned with insignificant details.

superlative form of nitpicky: most nitpicky

comparative form of nitpicky: more nitpicky