Basic Guidelines For English Spellings
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See US English definition of boom
See UK English definition of boom
See Spanish definition of bramido
1‘she heard the boom of the waves on the rocks below’
2‘retailers are cashing in on an unprecedented boom’
recession, slump
1‘thunder boomed in the sky overhead’
2‘a voice boomed at her from a small doorway’
whisper
3‘the property market continued to boom’
decline, slump