Definition of “sake” - Learner’s Dictionary

sake

noun us uk /seɪk/
for the sake of sth

B2 for this reason or purpose:

For the sake of convenience, they combined the two departments.
For safety's sake, you shouldn't swim alone.

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for the sake of sb

B2 in order to help or please someone:

He begged her to stay for the sake of the children.

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for God's/goodness/heaven's, etc sake

something you say when you are angry about something:

For heaven's sake, stop moaning!

(Definition of “sake” from the Cambridge Learner's Dictionary © Cambridge University Press)