Meaning ofassumptionin English

Noun

1. a supposition without proof; an unwarranted claim
   The researcher made an assumption about the data without testing it.
2. taking on a role or responsibility; adopting an idea
   The new employee's assumption of the management role was announced.
3. a thing supposed; a postulate or assumed proposition
   The assumption that all students have equal access to resources is not always true.