Hypothesis (4)
'hypothesis' is the definition.
(I know that hypothesis can be written as theory)
This is the entire clue.
(Other definitions for theory that I've seen before include "Guess" , "Hypothesis or concept" , "Assumption" , "Set of principles on which practice is based" , "Scientific conjecture" .)
'hypothesis' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for theorem that I've seen before include "Statement to be proved in maths" , "Geometric proposition" , "Proven proposition" , "Proof" , "speculation" .)
'hypothesis' is the definition.
(I know that supposition is a type of hypothesis)
This is the entire clue.
(Other definitions for supposition that I've seen before include "suspicion" , "conjecture" , "Surmise" , "theory" , "Assumption, hypothesis" .)
'hypothesis' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for idea that I've seen before include "Brainwave" , "Thought, belief" , "Fancy" , "A suspicion of" , "Light bulb above head" .)