an·ni·hi·late ( -n  -l t )v. an·ni·hi·lat·ed, an·ni·hi·lat·ing, an·ni·hi·lates v.tr. 1. a. To destroy completely: The naval force was annihilated during the attack. b. To reduce to nonexistence. c. To defeat decisively; vanquish. 2. To nullify or render void; abolish. v.intr. Physics To participate in annihilation, as an electron and a positron do. [Late Latin annihil re, annihilt- : Latin ad-, ad- + Latin nihil, nothing; see ne in Indo-European roots.]an·ni hi·la·bili·ty (-l-b l-t ) n.an·ni hi·la·ble (-l-bl) adj.an·ni hi·lator n. |
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