Definition of invest in
1
: to use money for (something) in order to earn more money
- He made a fortune by investing in real estate.
- He invested his savings in the business.
2
: to spend money for building or improving (something)
- The city will invest millions of dollars in two new schools.
- The city plans to invest heavily in its educational system this year.
3
: to give (time or effort) in order to do something or make something better
- A lot of time was invested in the project.
- We need to invest more effort in educating our children.
4
informal
: to spend money on (something useful or helpful to oneself)
- I am planning to invest in a good coat.
