Verb
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.
To consider attentively; as, to speculate the nature of a thing.
Source: Webster's dictionaryI mulled over the events of the afternoon Source: Internet
philosophers have speculated on the question of God for thousands of years Source: Internet
The scientist must stop to observe and start to excogitate Source: Internet
Scientists supposed that large dinosaurs lived in swamps Source: Internet
I bought this house not because I want to live in it but to sell it later at a good price, so I am speculating Source: Internet
We were speculating whether the President had to resign after the scandal Source: Internet