intrusion

n. entry by force or without permission; encroachment, infringement, trespass

In geology, an intrusion is a body of igneous rock that has crystallized from a molten magma below the surface of the Earth. Bodies of magma that solidify underground before they reach the surface of the earth are called plutons, named for Pluto, the Roman god of the underworld. Correspondingly, rocks of this kind are also referred to as igneous plutonic rocks or igneous intrusive rocks. This is to be contrasted with extrusive rocks. The rock surrounding a pluton is called country rock.
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Noun
1. any entry into an area not previously occupied; "an invasion of tourists"; "an invasion of locusts"
(synonym) invasion, encroachment
(hypernym) entrance, entering
2. entrance by force or without permission or welcome
(hypernym) entrance, entering, entry, ingress, incoming
3. the forcing of molten rock into fissures or between strata of an earlier rock formation
(hypernym) geological process, geologic process
4. rock produced by an intrusive process
(hypernym) rock, stone
5. entry to another's property without right or permission
(synonym) trespass, encroachment, violation, usurpation
(hypernym) wrongdoing, wrongful conduct, misconduct, actus reus
(hyponym) inroad
(derivation) trespass, intrude

n. intrusion, incursion, trespass, obtrusion

n. intrusion, trespass