1 [no object] put oneself deliberately into a place or situation where one is unwelcome or uninvited:he had no right to intrude into their livesshe felt awkward at intruding on private grief
enter with disruptive or adverse effect:the noise began to intrude into her thoughts
[with object] introduce (something) into a situation with disruptive or adverse effect:to intrude political criteria into military decisions risks reducing efficiency
2 [with object] Geology (of igneous rock) be forced or thrust into (an existing formation):the granite may have intruded these rock layers
force or thrust (igneous rock) into an existing formation.
