- Conjecture - Form a theory - Risk a guess - theorise - To consider by turning a subject in the mind, and
viewing it in its different aspects and relations; to meditate; to
contemplate; to theorize; as, to speculate on questions in religion; to
speculate on political events. - To view subjects from certain premises given or
assumed, and infer conclusions respecting them a priori. - To purchase with the expectation of a contingent
advance in value, and a consequent sale at a profit; -- often, in a
somewhat depreciative sense, of unsound or hazardous transactions; as,
to speculate in coffee, in sugar, or in bank stock.