C1adverb3K

Supposedly

UK /["/səˈpəʊzɪdli/"]/US /["/səˈpəʊzɪdli/"]/

Definition

according to what is generally thought or believed but not known for certain

In simple words: Something is believed to be true, but it may not be.

Examples

  • The novel is supposedly based on a true story.
  • a poem supposedly written by Shakespeare
  • Police have found the supposedly stolen car.

Usage notes

Use 'supposedly' when describing something that is commonly accepted but may not be true. It's neutral and generally suitable in both spoken and written contexts, but avoid in informal conversations.

Grammar pattern

supposedly + clause

Memory hint

Think of 'suppose' — if you suppose something, it might not be the real thing.

Collocations

  • supposedly true
  • supposedly said
  • supposedly happening
  • supposedly planned
  • supposedly proven

Synonyms

  • allegedly
  • presumably
  • reportedly
  • ostensibly
  • putatively

Antonyms

  • actually
  • definitely
  • certainly

Common mistakes

  • 'Supposedly' vs 'supposably' confusion.
  • Using 'supposedly' in overly formal contexts.
  • Misplacing 'supposedly' within a sentence.