The Collaborative International Dictionary of English v.0.48:

Pression \Pres"sion\, n. [L. pressio: cf. F. pression. See 4th
   Press.]
   1. The act of pressing; pressure. --Sir I. Newton.
      [1913 Webster]

   2. (Cartesian Philos.) An endeavor to move.
      [1913 Webster]