an explanation or definition of an obscure word in a text
an alphabetical list of technical terms in some specialized field of knowledge; usually published as an appendix to a text on that field
the property of being smooth and shiny
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"
Verb:
give a shine or gloss to, usually by rubbing
provide interlinear explanations for words or phrases;
"He annotated on what his teacher had written"
provide an interlinear translation of a word or phrase