As a Noun:
1. The act of paying money for things that you want.
2. The money that you pay for things. English = expenses, expenditure.
3. Money that you spend while doing something connected with your work and which is paid back to you afterwards. English = expenses.
As a Verb or Adjective:
1. To pay money for things that you want. English = spend, spend money.
2. To be worth spending money one, to be valuable in monetary terms.