GNU Collaborative International Dictionary of English

Found one definition

  1.       
    
    Posit , v. t. [imp. & p. p. Posited; p. pr. & vb. n. Positing.] [L. ponere, positum, to place. See Position.]
    1. To dispose or set firmly or fixedly; to place or dispose in relation to other objects.
      Sir M. Hale.

      1913 Webster
    2. (Logic) To assume as real or conceded; as, to posit a principle.
      Sir W. Hamilton.

      1913 Webster