exhibit (v.) Look up exhibit at Dictionary.com
mid-15c., from L. exhibit-, pp. stem of exhibere (see exhibition). The noun is recorded from 1620s, from L. exhibitum, neut. pp. of exhibere Related: Exhibited; exhibiting.
exhibit (n.) Look up exhibit at Dictionary.com
1620s, "document or object produced as evidence in court," from L. exhibitum, neut. pp. of exhibere (see exhibition). Transf. use of exhibit A "important piece of evidence" is 1906.