noun

1. a converting or being converted; specif.,
   1. a change from lack of faith to religious belief; adoption of a religion
   2. a change from one belief, religion, doctrine, opinion, etc. to another
2. Finance
   1. an exchange of one kind or class or security for another
   2. an exchange of a currency for an equivalent amount of another currency or precious metal
3. ☆ Football
   1. an additional scoring opportunity of a point or two, as by kicking, passing, or running with the ball, awarded to a team after it scores a touchdown
   2. the score so made
4. Rugby a somewhat similar play as in football that scores two points after a try
5. Law
   1. unlawful appropriation or use of another's property, resulting in a deprivation of ownership rights
   2. an exchange of property from real to personal, or the reverse, as for settling the terms of a will
      in full equitable conversion
6. Logic the interchanging of the terms of a proposition by conversion, “All of A is B” becomes “All of B is A”
7. Math. a change in the form of a quantity, a unit, or an expression without a change in the value
8. Psychiatry a mechanism by which emotional conflict is transformed into an apparent physical disability affecting the sensory or voluntary motor systems and having symbolic meaning
   also conversion reaction and Archaicconversion hysteria

Etymology: ME conversioun < OFr conversion < L conversio < pp. of convertere: see convert