DictionaryhypothesisProposed explanation or assumption
noun

hypothesis

high-PAH-thuh-sis/haɪˈpɑːθəsɪs/

An idea or assumption proposed for testing or reasoning.

The woman tests her hypothesis that a hidden magnet attracts clips to the box.

A compact observation–possible explanation–test sequence: a woman notices paper clips clinging to a plain closed wooden box, considers magnetic attraction by comparing this with a visible magnet, and prepares to investigate the box with a compass.
Etymology

Literally a “placing under,” a hypothesis was a foundation or basis for an argument. This became a supposition used as a premise, and in science a proposed explanation to investigate or test.

In context

Modern-Day Debate33:14
we have an unknown phenomenon we can't explain and you proposed a hypothesis that it's um demons of some kind non-physical things and i'm proposing an alternative hypothesis just an undiscovered physical force of some kind
Is There Something to Alien Abductions? | Dr Hugh Ross Vs TJump

More examples

  • Our hypothesis is that warmer soil helps seeds sprout faster.
  • Let's work from the hypothesis that both witnesses are telling the truth.
  • The new evidence rules out several competing hypotheses.

Forms

hypothesis · hypotheses

hypothesize verb — To propose an explanation or assumption for testing.

hypothetical adjective — Based on an assumption rather than established fact.

Similar words

theory
In science, a broader explanation supported by substantial evidence.
assumption
Something treated as true without necessarily being tested.
conjecture
A tentative conclusion drawn from incomplete evidence, not necessarily testable.