From Longman Dictionary of Contemporary Englishenlarge on/upon something phrasal verb formalDETAILto provide more information about something you have already mentioned Mrs Maughan did not enlarge on what she meant. → enlarge→ See Verb table
Examples from the Corpus
enlarge on/upon • To enlarge on an Emerson statement mentioned earlier: the organization is only half itself; the other half is its expression.• Each album benefited from and enlarged on an understanding of the others.• And neither Aunt Maggie nor Uncle Cedric nor even Amy had enlarged on him.• If the hon. Gentleman wants to table a question or write to me, I shall be glad to enlarge upon that.• He did not explain nor enlarge upon the story.• He has enlarged on these in a privately circulated note.• A later chapter will seek to enlarge upon this.• Mabel sat, vastly patient, waiting to see if he was going to enlarge upon this. 