(grammar) A linguistic category used to distinguish between the speaker of an utterance and other people; implemented in most languages by a variety of pronouns, and in inflected languages by variation in word endings.

(computing) A software application, like a spellchecker, that attempts to verify the grammar in a document.

(entomology) That eats grasses and seeds.

(obsolete) A Grammy.

the root of couch grass, once used medicinally

A person who studies grammar.

(computing theory) A formal grammar in which every production rule is such that the left-hand side is exactly one non-terminal symbol and the right-hand side is zero or more terminal symbols and/or nonterminal symbols.

(obsolete) Grammar; learning. / (archaic) Mystical learning; the occult, magic, sorcery.

Of or pertaining to plants in the grass family (Gramineae, Poaceae).

The killer whale, Orcinus orca. / Risso's dolphin, Grampus griseus, with a blunt nose. / The hellbender salamander, Cryptobranchus alleganiensis. / giant whip scorpion (Mastigoproctus giganteus)