(1):
(v. i.) To view subjects from certain premises given or assumed, and infer conclusions respecting them a priori.
(2):
(v. i.) 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.
(3):
(v. t.) To consider attentively; as, to speculate the nature of a thing.
(4):
(v. i.) 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.
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