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Webster 1913 Edition

Noun.

[Cf. F.

intromission

. See

The act of sending in or of putting in; insertion.

The act of letting go in; admission.

(Scots Law)

An intermeddling with the affairs of another, either on legal grounds or without authority.

Noun.

[L. intromissus, intromitto; intro and mitto, to send.]

The action of sending in.

In Scot's law, an intermeddling with the effects of another.

intromission ‎(plural intromissions)

the state of being allowed to enter; admittance
the act of allowing to enter; admission
putting one thing into another; insertion
- 1888, Henry James, The Reverberator.
  "Your father has told me all about it. Did you ever hear of anything so ridiculous?"
  "All about what?—all about what?" said Delia, whose attempt to represent happy ignorance seemed likely to be spoiled by an intromission of ferocity. She might succeed in appearing ignorant, but she could scarcely succeed in appearing happy.
copulation: normally refers to the first moment of initial entry of a **** into a ****, mouth or anus.
(law, Scotland) An intermeddling with the affairs of another, either on legal grounds or without authority.