back to entry
0/50
operation
mastery UK /ˌɒp.əˈɹeɪ.ʃən/ US /ˌɑ.pəˈɹeɪ.ʃən/noun
card 1 of 10 · preposition
The new safety rules have been _____ operation since the factory reopened.
card 1 of 10 · preposition
The new safety rules have been _____ operation since the factory reopened.