in ‧ ac ‧ tive /ɪnˈæktɪv/ BrE AmE adjective
[ Word Family: noun : ↑ act , ↑ action ≠ ↑ inaction , ↑ activity ≠ ↑ inactivity , ↑ reaction , ↑ interaction , ↑ overacting ; adjective : ↑ acting , ↑ active ≠ ↑ inactive ; verb : ↑ act ≠ ↑ overact ; adverb : ↑ actively ]
1 . not doing anything, not working, or not moving OPP 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