Definition of ratiocinate in English:



[no object]formal
  • Form judgements by a process of logic; reason.

    ‘a tendency to ratiocinate in isolation’
    • ‘Man is said, for instance, to be the ‘rational animal,’ but you won't find much ratiocinating among fetuses.’
    • ‘If the candidate seems prepared to ratiocinate every policy question rather than apply values to its solution, that candidate will lose.’
    • ‘His father, Alan Fry, was written up as the villain in these early times; an inventor whose ‘infuriatingly, cold, precise ratiocinating engine of a brain fuelled by a wholly egocentric passion.’’
    • ‘Almost definitely two, actually, since she knew there were three new arrivals, and of course, she had already met one, she ratiocinated.’
    think rationally, think logically, think straight, use one's mind, use one's common sense, use one's head, use one's brain, think things through, cogitate
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Mid 17th century: from Latin ratiocinat- ‘deliberated, calculated’, from the verb ratiocinari, from ratio (see ratio).