1 a [no obj] : to increase in size, range, or amount : to become bigger
▪ The liquid expands and contracts with changes in temperature. ▪ the expanding universe ▪ His business has expanded to serve the entire state. ▪ The coffee shop may expand into a full restaurant.
b [+ obj] : to cause (something) to increase in size, range, or amount : to make (something) bigger
▪ He has expanded his business to serve the entire state. ▪ There are plans to expand the airport. ▪ The police have decided to expand their investigation. ▪ She plans to expand the lecture series into a book. ▪ This trip will give you an opportunity to expand [=broaden] your horizons. [=to learn more about the world] ▪ expand your knowledge 2 [+ obj] : to write (something) in full form
▪ Expand the abbreviation “deg.” to “degree.”
▪ The liquid expands and contracts with changes in temperature. ▪ the expanding universe ▪ His business has expanded to serve the entire state. ▪ The coffee shop may expand into a full restaurant.
b [+ obj] : to cause (something) to increase in size, range, or amount : to make (something) bigger
▪ He has expanded his business to serve the entire state. ▪ There are plans to expand the airport. ▪ The police have decided to expand their investigation. ▪ She plans to expand the lecture series into a book. ▪ This trip will give you an opportunity to expand [=broaden] your horizons. [=to learn more about the world] ▪ expand your knowledge
▪ Expand the abbreviation “deg.” to “degree.”
expand on/upon [phrasal verb]
expand on/upon (something) : to speak or write about (something) in a more complete or detailed way
▪ She declined to expand on her earlier statement. ▪ Please expand [=elaborate] on that idea. ▪ Researchers will expand upon their data in a new study.
▪ She declined to expand on her earlier statement. ▪ Please expand [=elaborate] on that idea. ▪ Researchers will expand upon their data in a new study.





