Now rare or Obs. [ad. med.L. trūsiōn-em, n. of action f. trūdĕre to push, thrust. In sense 1 app. short for intrusion.]

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  1.  Law. Illegal entry: = INTRUSION 2.

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a. 1604.  Hanmer, Chron. Irel. (1809), 349. It was agreed, that his wife should not be endowed, because that her husband had not entred by the King, but rather by trusion.

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  2.  The action of pushing or thrusting.

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1656.  trans. Hobbes’ Elem. Philos. (1839), 214. Pulsion;… when the motions of the movent and moved body begin both together … may be called trusion or thrusting and vection.

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1678.  Cudworth, Intell. Syst., I. v. § 5. 888. As Engines and Machines move, by Trusion or Pulsion.

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1729.  Desaguliers, in Phil. Trans., XXXVI. 132. If … the Point of Trusion be taken at C.

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