To take a decision is to reach a formal choice and stand behind it. A minister at a despatch box, a board in a long room, a committee that has finally stopped talking.
This is the formal British twin of make a decision, and the difference is who is doing it. A person makes one; an institution takes one. American English does not use take here at all, so a US reader hears it as slightly wrong and a British civil servant hears make as slightly casual. It takes on or about: they took a decision on funding.
1phrasetake a decisionTo reach and announce a formal choice.
“Ministers must take a decision by the end of the month.”
take a decision is a formal act of choosing.
Practised in Common Word Pairs