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v. an·ni·hi·lat·ed, an·ni·hi·lat·ing, an·ni·hi·lates
a. To destroy completely: The naval force was annihilated during the attack.
b. To reduce to nonexistence: "He had not just to hide his hunger; so as not to go mad he had to annihilate it" (Philip Roth).
c. To defeat decisively: annihilated the league champions in the playoffs.
2. Physics To convert (a subatomic particle) to energy or high-energy particles by annihilation.
1. To be completely destructive.
2. Physics To participate in annihilation. Used of particles and antiparticles.

[Late Latin annihilāre, annihilāt- : Latin ad-, ad- + Latin nihil, nothing; see ne in Indo-European roots.]

an·ni′hi·la·bil′i·ty (-lə-bĭl′ĭ-tē) n.
an·ni′hi·la·ble (-lə-bəl) adj.
an·ni′hi·la′tor n.
Synonyms: annihilate, exterminate, extinguish, obliterate
These verbs mean to destroy completely. Annihilate often implies that the destruction is so severe that nothing is left or salvagable: The cannon blasts annihilated the enemy's fortifications.
Exterminate emphasizes the elimination of that which is considered undesirable, especially by killing: "The land had been rendered treeless, as though a tree were a parasite that needed to be exterminated, its stump uprooted and purged" (Madhusree Mukerjee).
Extinguish is to put an end to something or to make something extinct: The teacher's criticism of my essay extinguished my enthusiasm for the project.
To obliterate is to leave no trace of that which is destroyed: The virus obliterates all data on the hard drive of any computer it infects.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.annihilated - destroyed completelyannihilated - destroyed completely      
destroyed - spoiled or ruined or demolished; "war left many cities destroyed"; "Alzheimer's is responsible for her destroyed mind"
References in classic literature ?
He shook his head and beckoned her to come away, but she was fascinated just then by the freedom of Speculative Philosophy, and kept her seat, trying to find out what the wise gentlemen intended to rely upon after they had annihilated all the old beliefs.
All those busy and ingenious speculations were now annihilated by the conduct of his captors.
And it rendered his aspect not the less, but more frightful, that it seemed not to express wrath or hatred, but a certain hot fellness of purpose, which annihilated everything but itself.
So vivid was the expression, or so intense the minister's perception of it, that it seemed still to remain painted on the darkness after the meteor had vanished, with an effect as if the street and all things else were at once annihilated.
Within ten short minutes after we had opened fire, armed resistance was totally annihilated, the campaign was ended, we fifty-four were masters of England.
As if, when the marriage institution is abolished, concubinage, adultery, and incest, must not necessarily abound; when all the rights of humanity are annihilated, any barrier remains to protect the victim from the fury of the spoiler; when absolute power is assumed over life and liberty, it will not be wielded with destruc- tive sway
Magdalen's reception of the news which annihilated the marriage prospect that her father's own lips had placed before her not a month since, had bewildered and dismayed them alike.
The happiness of his own chosen English home, the necessity of being always actively employed, the swift changes and troubles of the time which bad followed on one another so fast, that the events of this week annihilated the immature plans of last week, and the events of the week following made all new again; he knew very well, that to the force of these circumstances he had yielded:--not without disquiet, but still without continuous and accumulating resistance.
Insensibly this mass of almost annihilated beings became so compact, so deaf, so torpid, so happy perhaps, that Marechal Victor, who had been their heroic defender by holding twenty thousand Russians under Wittgenstein at bay, was forced to open a passage by main force through this forest of men in order to cross the Beresina with five thousand gallant fellows whom he was taking to the emperor.
A whole army of Polygons, who turned out to fight as private soldiers, was utterly annihilated by a superior force of Isosceles Triangles -- the Squares and Pentagons meanwhile remaining neutral.
Our horror was at its height, circulation had stopped, all nervous influence was annihilated, and we were covered with cold sweat, like a sweat of agony
In the other cases the shells had missed, and the batteries had been at once annihilated by the Heat- Rays.