Definition of "grammarian" in English

noun

1. A person who studies grammar, either scientifically or (traditionally) unscientifically.

   • Huddleston and Pullum are well-known grammarians of the 21st century.

2. (loosely) A person who pedantically critiques the grammar of others' speech or writing, especially when unscientifically and misguidedly.

   • They spent hours disabusing the misinformed rants of various armchair grammarians.