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Related to expand on: reflect on, stick with, turn back, turn up, align with, make it to, take it for granted
expand (up)on (something)
To discuss a topic in more detail. This is such an important point that I'd like you to expand upon it when you revise your paper.
See also: expand
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
expand (up)on somethingand enlarge (up)on something
Fig. to add detail to a report about something; to say more about something. Would you please expand upon that last remark? Would you care to enlarge upon your remarks?
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.