Definition of off or way off beam in English:

off (or way off) beam

informal On the wrong track; mistaken: you’re way off beam on this one
More example sentences
  • George Orwell wasn't wrong about much but he was way off beam with his famously jaundiced view of sport.
  • In order to spare you any possible disappointment, I should say up front that Robinson is wrong - utterly and mind-bogglingly off beam.
  • I believe ‘Neighbours’ became a preferred route only later in her development, so to claim that now as the basis for the management split seems way off beam to my thinking.
Synonyms
See parent entry: beam

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Word of the day abjure
Pronunciation: əbˈdʒʊə
verb
solemnly renounce (a belief, cause, or claim)