Definition of knocker-up in English:

knocker-up

Line breaks: knocker-up

Entry from British & World English dictionary

noun (plural knockers-up)

British historical
A person employed to rouse workers by knocking at their doors or windows.

Definition of knocker-up in:

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Word of the day hypnopompic
Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up