Source : Webster's Revised Unabridged Dictionary (1913)

Repulsion \Re*pul"sion\ (r?-p?l"sh?n), n. [L. repulsio: cf. F.
   r['e]pulsion.]
   1. The act of repulsing or repelling, or the state of being
      repulsed or repelled.

   2. A feeling of violent offence or disgust; repugnance.

   3. (Physics) The power, either inherent or due to some
      physical action, by which bodies, or the particles of
      bodies, are made to recede from each other, or to resist
      each other's nearer approach; as, molecular repulsion;
      electrical repulsion.

Source : WordNet®

repulsion
     n 1: the force by which bodies repel one another [syn: {repulsive
          force}] [ant: {attraction}]
     2: intense aversion [syn: {repugnance}, {revulsion}, {horror}]
     3: the act of repulsing or repelling an attack; a successful
        defensive stand [syn: {standoff}]