Chief of the Defence Staff
noun/ˌtʃiːf əv ðə dɪˈfens stɑːf/
/ˌtʃiːf əv ðə dɪˈfens stæf/
- the military officer in charge of all of Britain's armed forces
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Chief of the Defence Staff
Definition of Chief of the Defence Staff noun from the Oxford Advanced Learner's Dictionary