Meaning of “operational” in the English Dictionary

"operational" in British English

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operationaladjective

uk /ˌɒp.ərˈeɪ.ʃən.əl/ us /ˌɑː.pəˈreɪ.ʃən.əl/
operationally
adverb uk /ˌɒp.ərˈeɪ.ʃən.əl.i/ us /ˌɑː.pəˈreɪ.ʃən.əl.i/

(Definition of “operational” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"operational" in American English

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operationaladjective [ not gradable ]

us /ˌɑp·əˈreɪ·ʃə·nəl/

(of machinery, devices, or processes) ready to work correctly:

Repairs have already begun and we expect the plant to soon be fully operational (= working correctly and completely).

(Definition of “operational” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"operational" in Business English

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operationaladjective

uk /ˌɒpərˈeɪʃənəl/ us

[ before noun ] relating to the activities involved in doing or producing something:

operational activities/decisions/control The majority of shareholders are interested in investment, not in operational control of the firm.
operational aspects/difficulties/constraints
operational effectiveness/efficiencies
There are operational advantages in putting sales and admin in the same building.

if a system is operational, it is working:

Repairs have already begun and we expect the factory to be fully operational again within six months.

(Definition of “operational” from the Cambridge Business English Dictionary © Cambridge University Press)