/ ˌækləˈmeɪʃn; NAmE / noun [ U ]
1.
( formal ) loud and enthusiastic approval or welcome
2.
( technical ) the act of electing sb using a spoken not written vote :
The decision was taken by acclamation .
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WORD ORIGIN
mid 16th cent.: from Latin acclamatio(n-) , from acclamare shout at, from ad- to + clamare to shout, later shout in approval.