gloss

(noun) an explanation or definition of an obscure word in a text. Synonyms: rubric.

(noun) an alphabetical list of technical terms in some specialized field of knowledge; usually published as an appendix to a text on that field. Synonyms: glossary.

(noun) the property of being smooth and shiny. Synonyms: polish, glossiness, burnish.

(noun) an outward or token appearance or form that is deliberately misleading. Synonyms: semblance, color, colour. Examples: "He hoped his claims would have a semblance of authenticity." "He tried to give his falsehood the gloss of moral sanction." "The situation soon took on a different color."

(verb) give a shine or gloss to, usually by rubbing.

(verb) provide interlinear explanations for words or phrases. Synonyms: comment, annotate. Example: "He annotated on what his teacher had written."

(verb) provide an interlinear translation of a word or phrase.

(verb) give a deceptive explanation or excuse for. Synonyms: color, colour. Example: "Color a lie."