gloss, rubric -- (an explanation or definition of an obscure word in a text)
glossary, gloss -- (an alphabetical list of technical terms in some specialized field of knowledge; usually published as an appendix to a text on that field)
semblance, gloss, color, colour -- (an outward or token appearance or form that is deliberately misleading; "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")
Overview of verb gloss
The verb gloss has 4 senses
gloss -- (give a shine or gloss to, usually by rubbing)
gloss, comment, annotate -- (provide interlinear explanations for words or phrases; "He annotated on what his teacher had written")
gloss -- (provide an interlinear translation of a word or phrase)
color, colour, gloss -- (give a deceptive explanation or excuse for; "color a lie")