(often + in) to commit (money) to a particular use, e.g. buying shares or new capital outlay, in order to earn a financial return
(often + in) to devote (e.g. time or effort) to something for future advantages
to make an investment
We decided to invest in a new car
investable adj
investor noun
[Italian investire to clothe, invest money, from Latin investire: see invest2]