Available Definitions:
1) p. a. - Same as Intrusive.
2) v. t. - To thrust or force (something) in or upon; especially, to force (one's self) in without leave or welcome; as, to intrude one's presence into a conference; to intrude one's opinions upon another.
3) v. t. - To enter by force; to invade.
4) v. t. - The cause to enter or force a way, as into the crevices of rocks.