The Oxford Thesaurus An A-Z Dictionary of Synonyms - glossэn.

1) explanation, interpretation, exegesis, explication, definition, elucidation, comment, commentary, annotation, critique, criticism, analysis, footnote; translation: Some editions of Shakespeare give glosses of difficult words and phrases at the foot of each page. --v. 2) comment on or upon, explain, interpret, explicate, define, elucidate, annotate, criticize, analyse, review, US critique; translate: Johnson was not the first to gloss the word 'pastern'. 3) See gloss°, 4, above.