Longman Dictionary of Contemporary English homepage

inactive

adjective
     
Related topics: Geology
in‧ac‧tive
1 not doing anything, not working, or not moving [≠ active]:
The brain cells are inactive during sleep.
Young people are becoming politically inactive.
2 not taking part in something that normally you would take part in:
Graham's knee injury means he will be inactive for Sunday's game.
3 technical an inactive substance does not react chemically with other substances

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