Theorise

verb

verb ·Rare ·Advanced level

Definitions

Verb
  1. 1
    Non-Oxford British English standard spelling of theorize. UK, alt-of, nonstandard

    "In Physics of the Impossible, he theorises about how the gadgets that turn up in works by authors from HG Wells to JK Rowling (as well as the cardboard-scenery sci-fi TV of our youth) may become reality."

  2. 2
    to believe especially on uncertain or tentative grounds wordnet

Synonyms

All synonyms
conjecturehypothecatehypothesisehypothesizespeculatespeculate

Example

More examples

"I've seen them theorise. They're willing to jump to conclusions very quickly."

Etymology

From theory + -ise.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.