A surface shine or luster.

(figurative) A superficially or deceptively attractive appearance.

(countable) A brief explanatory note or translation of a foreign, archaic, technical, difficult, complex, or uncommon expression, inserted after the original, in the margin of a document, or between lines of a text.

(countable) A glossary; a collection of such notes.

(countable) An extensive commentary on some text.

(countable, law, US) An interpretation by a court of a specific point within a statute or case law.

(transitive) To give a gloss or sheen to.

(transitive) To make (something) attractive by deception

(intransitive) To become shiny.

(transitive, idiomatic) Used in a phrasal verb: gloss over (“to cover up a mistake or crime, to treat something with less care than it deserves”).

(transitive) To add a gloss to (a text).