1. [ noun ] a proposal intended to explain certain facts or observations
Related terms: proposal speculate
2. [ noun ] a tentative theory about the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
Synonyms: theory possibility

"a scientific hypothesis that survives experimental testing becomes a scientific theory"

Related terms: concept model assumption speculation theory speculate
3. [ noun ] a message expressing an opinion based on incomplete evidence
Synonyms: guess speculation surmise supposition surmisal conjecture
Related terms: opinion divination think estimate speculate guess suspect surmise
Similar spelling:   hypothesise