Topic: FINANCE
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in‧vest‧ment W1

1 [uncountable and countable]BF the use of money to get a profit or to make a business activity successful, or the money that is used COLLOCATIONS 
make an investment (in something) return on an investment (=profit from an investment) short-term/long-term investment (=one that will give you profit in a short time, or only after a long time) stimulate/encourage/attract investment investment income
Foreign investment in Taiwan rose by 79% last year.
A Certificate of Deposit remains one of the safest investments.
We plan to buy some property as an investment.

make an investment (in something) return on an investment (=profit from an investment) short-term/long-term investment (=one that will give you profit in a short time, or only after a long time) stimulate/encourage/attract investment investment income
Foreign investment in Taiwan rose by 79% last year.
A Certificate of Deposit remains one of the safest investments.
We plan to buy some property as an investment.2 [countable] something that you buy or do because it will be useful later
3 [singular,uncountable] when you spend a large amount of time, energy, emotion etc on something :
a huge investment of time and effort
a huge investment of time and effort