1
general::
noun
guesswork, incomplete evidence:
His ideas were based on pure conjecture.
verb
guess, opinion without evidence:
He would conjecture about the outcome.
Simple Definitions
2
general::
noun ADJ. pure Whether the business will survive another ten years is pure conjecture. PREP. ~ about/as to There was a lot of conjecture as to the extent of her wealth. PHRASES a matter for conjecture, open to conjecture Whether she will run for a second term in office is open to conjecture.
Oxford Collocations Dictionary