(1. a large-scale public display or show, as of art or manufactured products)
Will you be attending the motorcycle exposition this week in New York?
(2. a setting forth of meaning or intent)
Would you rather a lengthy exposition or a short explanation?
Discussion is to be used for conversations about answers and question. Question askers may use it for clarification or exposition to help with answering.
exposure
Exposition
you just used the word variable in a question :)
It seems like there may be a typo in your question. An exposition typically refers to a comprehensive explanation of an idea or theory. Your family would not be considered an exposition. If you could provide more context or rephrase your question, I'd be happy to help further.
display, exposition, illustration
The student wrote an exposition about conserving energy.
Please check your coin again and post a new, separate question. There were no "exposition half dollars" minted in 1883. If you're referring to a Columbian Exposition half, these were minted in 1892 and 1893; there's more information at the Related Question.
Introduction or background information.
your question is your answer
a question that has no answer
you don't.