Magnon in English dictionary magnon Meanings and definitions of "Magnon" (physics) a quantum of a spin wave noun (physics) a quantum of a spin wave. noun a quasiparticle and a collective excitation of the electrons' spin structure in a crystal lattice. In the equivalent wave picture of quantum mechanics, a magnon can be viewed as a quantized spin wave. more Grammar and declension of Magnon magnon ( plural magnons) more Magnon Sample sentences with "Magnon" Declension Stem Try again Available translations French Irish Polish Spanish Tamil Authors