Definition of "Citation" :

noun: thoroughbred that won the triple crown in 1948

noun: a summons that commands the appearance of a party at a proceeding

noun: a passage or expression that is quoted or cited

noun: an official award (as for bravery or service) usually given as formal public statement

noun: a short note recognizing a source of information or of a quoted passage

"The student's essay failed to list several important citations."

noun: (law) the act of citing (as of spoken words or written passages or legal precedents etc.)