Meaning of electron affinity

elec'tron affin"ity

Pronunciation: [key]
— Physics, Chem. Physics,Chem.
  1. the quantitative measure, usually given in electron-volts, of the tendency of an atom or molecule to capture an electron and to form a negative ion.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.