1. noun /ˈɹɛf.ɹəns,ˈɹɛf.ɜː(ɹ).əns/
a) A measurement one can compare to.
b) Information about a person, provided by someone (a referee) with whom they are well acquainted
2. verb /ˈɹɛf.ɹəns,ˈɹɛf.ɜː(ɹ).əns/
a) to refer to, to make reference to, to cite
Reference the dictionary for word meanings.
b) to mention
Wikipedia foundation.