*trusion*

n. [ L. detrusio. See Detrude. ] The act of thrusting or driving down or outward; outward thrust. -- De*tru"sive, a. [1913 Webster]

n. The act of thrusting or pushing out; a driving out; expulsion. [ 1913 Webster ]

n. [ Cf. F. intrusion. See Intrude. ] [ 1913 Webster ]

1. The act of intruding, or of forcing in; especially, the forcing (one's self) into a place without right or welcome; encroachment. [ 1913 Webster ]

Why this intrusion?
Were not my orders that I should be private? Addison. [ 1913 Webster ]

2. (Geol.) The penetrating of one rock, while in a plastic or metal state, into the cavities of another. [ 1913 Webster ]

3. (Law) The entry of a stranger, after a particular estate or freehold is determined, before the person who holds in remainder or reversion has taken possession. [ 1913 Webster ]

4. (Scotch Ch.) The settlement of a minister over a congregation without their consent. [ 1913 Webster ]

a. Of or pertaining to intrusion. [ 1913 Webster ]

n. One who intrudes; especially, one who favors the appointment of a clergyman to a parish, by a patron, against the wishes of the parishioners. [ 1913 Webster ]

n. [ L. obtrusio. See Obtrude. ] 1. The act of obtruding; a thrusting upon others by force or unsolicited; as, the obtrusion of crude opinions on the world. [ 1913 Webster ]

2. That which is obtruded. Milton. [ 1913 Webster ]

n. One who practices or excuses obtrusion. [ R. ] Gent. Mag. [ 1913 Webster ]

n. 1. The act of protruding or thrusting forward, or beyond the usual limit. [ 1913 Webster ]

2. The state of being protruded, or thrust forward. [ 1913 Webster ]

n. The act of retruding, or the state of being retruded. [ 1913 Webster ]

In virtue of an endless remotion or retrusion of the constituent cause. Coleridge. [ 1913 Webster ]