When you Invade, you aggressively take over or occupy a place. If a country's leader wants to gain more land, the military might invade a neighboring country.

Not everything that invades is militaristic. Some things that invade are cultural, such as the phenomena of young, stylish people moving into a neighborhood that had never been thought of as cool before. In an instant, new restaurants and shops catering to the newcomers open and soon the area is overrun with people wearing, say, skinny jeans and complicated eyewear. Natives to the area lament, "This place has been invaded by hipsters."

Definitions of invade
  1. verb
    march aggressively into another's territory by military force for the purposes of conquest and occupation
    “Hitler invaded Poland on September 1, 1939”
    synonyms: occupy
    see moresee less
    infest, overrun
    invade in great numbers
    type of:
    assail, attack
    launch an attack or assault on; begin hostilities or start warfare with
  2. verb
    occupy in large numbers or live on a host
    synonyms: infest, overrun
    see moresee less
    type of:
    be present in
  3. verb
    penetrate or assault, in a harmful or injurious way
    “The cancer had invaded her lungs”
    see moresee less
    type of:
    interpenetrate, permeate
    penetrate mutually or be interlocked
  4. verb
    intrude upon, infringe, encroach on, violate
    “This new colleague invades my territory”
    synonyms: encroach upon, intrude on, obtrude upon
    see moresee less
    foray into, raid
    enter someone else's territory and take spoils
    raid and rove in search of booty
    type of:
    come in, enter, get in, get into, go in, go into, move into
    to come or go into
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week