Definition 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"

Exact synonyms: Occupy
Generic synonyms: Assail, Attack
Specialized synonyms: Infest, Overrun
Derivative terms: Invader, Invasion, Invasive, Occupation, Occupier

2. Verb. To intrude upon, infringe, encroach on, violate. "The neighbors intrude on your privacy"
Exact synonyms: Encroach Upon, Intrude On, Obtrude Upon
Generic synonyms: Come In, Enter, Get In, Get Into, Go In, Go Into, Move Into
Specialized synonyms: Foray Into, Raid
Derivative terms: Invader, Invasion, Invasive

3. Verb. Occupy in large numbers or live on a host. "The Kudzu plant infests much of the South and is spreading to the North"
Exact synonyms: Infest, Overrun
Generic synonyms: Inhabit
Derivative terms: Infestation, Infestation, Invasion

4. Verb. Penetrate or assault, in a harmful or injurious way. "The cancer had invaded her lungs"
Generic synonyms: Interpenetrate, Permeate
Derivative terms: Invasion, Invasive

Definition of Invade

1. v. t. To go into or upon; to pass within the confines of; to enter; -- used of forcible or rude ingress.

2. v. i. To make an invasion.

Definition of Invade

1. Verb. (transitive) To move into. ¹

2. Verb. (transitive) To enter by force in order to conquer. ¹

3. Verb. (transitive) To infest or overrun. ¹

¹ Source:

Definition of Invade

1. to enter for conquest or plunder [v -VADED, -VADING, -VADES]

Medical Definition of Invade

1. 1. To go into or upon; to pass within the confines of; to enter; used of forcible or rude ingress. "Which becomes a body, and doth then invade The state of life, out of the grisly shade." (Spenser) 2. To enter with hostile intentions; to enter with a view to conquest or plunder; to make an irruption into; to attack; as, the Romans invaded Great Britain. "Such an enemy Is risen to invade us." (Milton) 3. To attack; to infringe; to encroach on; to violate; as, the king invaded the rights of the people. 4. To grow or spread over; to affect injuriously and progressively; as, gangrene invades healthy tissue. Synonym: To attack, assail, encroach upon. See Attack. Origin: L. Invadere, invasum; pref. In- in + vadere to go, akin to E. Wade: cf. OF. Invader, F. Envahir. See Wade. Source: Websters Dictionary (01 Mar 1998)

Invade Pictures

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Lexicographical Neighbors of Invade

invA protein
invade (current term)

Literary usage of Invade

Below you will find example usage of this term as found in modern and/or classical literature:

1. The English Works of Thomas Hobbes of Malmesbury by Thomas ( Hobbes (1843)
"For when one is grown mightier than the rest, men use not only to defend themselves against him when he shall invade, but i [" And the hope &c. was never 2 ..."

2. The history of the decline and fall of the Roman empire by Edward Gibbon (1862)
"... who pitched their tents m the neigh- invade Asia, bourhood of the lake Maeotis. Those barbarians, allured puis«i hy by presents ..."

3. The History of England from the Accession of James the Second by Thomas Babington Macaulay Macaulay, Hannah More Macaulay Trevelyan (1858)
"The way to prevent that descent was to invade the Spanish Netherlands, and to menace the Batavian frontier. The Prince of Orange, indeed, was so bent on his ..."

4. History of the War in the Peninsula and in the South of France, from the by William Francis Patrick Napier (1842)
"... to invade Portugal— The first corps is directed to aid this operation—-Soult goes to St. Jago—Distressed state ofthe second corps—Operations of Romana ..."

5. History of the War in the Peninsula and in the South of France: From the by William Francis Patrick Napier (1842)
"... and Ferrol surrender to Soult—He is ordered, by the emperor, to invade Portugal— The first corps is directed to aid this operation—Soult goes to ..."

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