- tending or apt to intrude; coming without invitation or welcome: intrusive memories of a lost love.
- characterized by or involving intrusion.
- intruding; thrusting in.
- (of a rock) having been forced between preexisting rocks or rock layers while in a molten or plastic condition.
- noting or pertaining to plutonic rocks.
- Phonetics. excrescent(def 2).
- characterized by intrusion or tending to intrude
- (of igneous rocks) formed by intrusionCompare extrusive (def. 2)
- phonetics relating to or denoting a speech sound that is introduced into a word or piece of connected speech for a phonetic rather than a historical or grammatical reason, such as the (r) often pronounced between idea and of in the idea of it
adj.c.1400, from Latin intrus-, past participle stem of intrudere (see intrusion) + -ive. Related: Intrusively; intrusiveness.