to observe (a day) or commemorate (an event) with ceremonies or festivities: to celebrate Christmas; to celebrate the success of a new play.
2.
to make known publicly; proclaim: The newspaper celebrated the end of the war in red headlines.
3.
to praise widely or to present to widespread and favorable public notice, as through newspapers or novels: a novel celebrating the joys of marriage; the countryside celebrated in the novels of Hardy.
4.
to perform with appropriate rites and ceremonies; solemnize: to celebrate a marriage.
Origin: 1425–75; late Middle English < Latin celebrātus past participle of celebrāre to solemnize, celebrate, honor, equivalent to celebr- (stem of celeber) often repeated, famous + -ātus-ate1
1465, from L. celebratus pp. of celebrare "to frequent in great numbers, assemble to honor," from celeber "frequented, populous." Celebrated "much-talked-about" is from 1665.