Origin of the word:

mid-14c., "that which is choice," from choice (adj.) blended with earlier chois (n.) "action of selecting" (c. 1300); "power of choosing" (early 14c.), "the person or thing chosen" (late 14c.), from Old French chois "one's choice; fact of having a choice" (12c., Modern French choix), from verb choisir "to choose, distinguish, discern; recognize, perceive, see," which is from Frankish or some other Germanic source and related to Old English ceosan "to choose, taste, try" (from PIE root *geus- "to taste; to choose").

Late Old English chis "fastidious, choosy," from or related to ceosan, probably also contributed to the development of choice. Choice replaced Old English cyre "choice, free will," from the same base, probably because the imported word was closer to choose [see note in OED].

Definition:

1. an act of choosing between two or more possibilities.
2. the right or ability to choose.
3. a range of possibilities from which one or more may be chosen.
4. a thing or person which is chosen.

Other useful definitions by Creative, and Game-Changing Thinkers:

"We often think of choice as a thing. But a choice is not a thing. Our options maybe things, but a choice - a choice is an action. It is not just something we have but something we do." - Essentialism by Greg McKeown

After all, we MAKE CHOICES ... it is an action

"The ability to choose cannot be taken away or even given away - it can only be forgotten" - Essentialism by Greg McKeown