Intrusive may refer to: *

Intrusiveness Intrusiveness can refer to a behavior, act, state or disposition towards being intrusive, interrupting and disturbing to others. Intrusiveness is typically unwelcome and recipients of intrusive behavior may feel like the intruder is coming without w ...

, a typically unwelcome behavior, interrupting and disturbing to others *

Intrusive rock Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form ''Igneous intrusion, intrusions'', such as batholiths, dike (geology), dikes, Sill (geology), sills, laccoliths, and volcanic necks.I ...

, intrusion of molten magma leaving behind igneous rock *

Saltwater intrusion Saltwater intrusion is the movement of saline water into freshwater aquifers, which can lead to groundwater quality degradation, including drinking water sources, and other consequences. Saltwater intrusion can naturally occur in coastal aquifers, ...

, the movement of saline water into freshwater aquifers *

Intrusive thought An intrusive thought is an unwelcome, involuntary thought, image, or unpleasant idea that may become an obsession, is upsetting or distressing, and can feel difficult to manage or eliminate. When such thoughts are paired with obsessive–compulsi ...

, an unwelcome involuntary thought, image, or unpleasant idea *

Linking and intrusive R Linking R and intrusive R are sandhi phenomena wherein a rhotic consonant is pronounced between two consecutive vowels with the purpose of avoiding a hiatus, that would otherwise occur in the expressions, such as ''tuner amp'', although in isola ...

, in phonetics

See also