|Origin:||expandere, from pandere 'to spread'|
1 [intransitive and transitive]
to become larger in size, number, or amount, or to make something become larger [↪ expansion; ≠ contract]:
Water expands as it freezes.
Sydney's population expanded rapidly in the 1960s.
exercises that expand the chest muscles
his expanding waistline
2 [intransitive and transitive]
if a company, business etc expands, or if someone expands it, they open new shops, factories etc [↪ expansion]:
The computer industry has expanded greatly over the last decade.
The hotel wants to expand its business by adding a swimming pool.
the rapidly expanding field of information technology
We have plans to expand into the U.S. market.
3 [intransitive] literary
to become more confident and start to talk more:
After a few whiskies he started to expand a little.
expand on/upon somethingphrasal verb
Payne later expanded on his initial statement.