- 1to form an opinion about something even though you do not have much information on it synonym guess
- 2 conjecture (about something) We can only conjecture about what was in the killer's mind. conjecture what/how, etc… We can only conjecture what was in the killer's mind conjecture that… He conjectured that the population might double in ten years. conjecture something She conjectured the existence of a completely new species. conjecture something to do something The remains are conjectured to be thousands of years old.
NAmE//kənˈdʒɛktʃər//[intransitive, transitive](formal)Verb Forms present simple I / you / we / they conjecture
he / she / it conjectures
past simple conjectured
-ing form conjecturing