From Longman Dictionary of Contemporary Englishexpand on/upon something phrasal verbDETAILto add more details or information to something that you have already said Payne later expanded on his initial statement. → expand→ See Verb table
Examples from the Corpus
expand on/upon • Much of its strength rests with the third-parties alliances it has created and wants to expand on.• Convention center plans call for expanding upon an outdoor parking lot adjacent to, and south of, the existing center.• Basil Matthews gave him the opportunity to expand on his vision of the West Indies under the full glare of publicity.• It was absolutely no good just giving them a sketch and expecting them to expand on it using their own initiative.• In treating such a philosophical topic, the underlying principles should have been expanded on, rather than just being described.• Returning on air, Dick Enberg got Maguire to expand on the comment.• The text that follows expands on the details of each of the ten steps.• In this Report we draw these comments together, and expand on them in chapter 11. 