verb To reduce to nothing, to destroy, to eradicate.
An atom bomb can annihilate a whole city.
verb To react with antimatter, producing gamma radiation and (for higher-mass reactants, especially composite particles such as protons) lighter particles (such as pions, muons, and neutrinos).
verb To treat as worthless, to vilify.
verb To render null and void; to abrogate.
verb To cause to become zero by means of an annihilator operator.