ceremony
noun
ˈserəməni 
ˈserəmoʊni 
1 [countable] a public or religious occasion that includes a series of formal or traditional actionsan awards/opening ceremonya wedding/marriage ceremony2 [uncountable] formal behaviour; traditional actions and words used on particular formal occasionsThe royal guests were welcomed with pomp and ceremony.Idioms
stand on ceremony
(British English) to behave formallyPlease don't stand on ceremony (= Please be natural and relaxed) with me.without ceremony
in a very rough or informal way
He found himself pushed without ceremony out of the house and the door slammed in his face.
Usage note: Marriage and divorceRomancefall/be (madly/deeply/hopelessly) in love (with somebody)be/believe in/fall in love at first sightbe/find true love/the love of your lifesuffer (from) (the pains/pangs of) unrequited lovehave/feel/show/express great/deep/genuine affection for somebody/somethingmeet/marry your husband/wife/partner/fiancé/fiancée/boyfriend/girlfriendhave/go on a (blind) datebe going out with/(especially North American English) dating a guy/girl/boy/man/womanmove in with/live with your boyfriend/girlfriend/partnerWeddingsget/be engaged/married/divorcedarrange/plan a weddinghave a big wedding/a honeymoon/a happy marriagehave/enter into an arranged marriagecall off/cancel/postpone your weddinginvite somebody to/go to/attend a wedding/a wedding ceremony/a wedding receptionconduct/perform a wedding ceremonyexchange rings/wedding vows/marriage vowscongratulate/toast/raise a glass to the happy couplebe/go on honeymoon (with your wife/husband)celebrate your first (wedding) anniversarySeparation and divorcebe unfaithful to/(informal) cheat on your husband/wife/partner/fiancé/fiancée/boyfriend/girlfriendhave an affair (with somebody)break off/end an engagement/a relationshipbreak up with/split up with/(informal) dump your boyfriend/girlfriendseparate from/be separated from/leave/divorce your husband/wifeannul/dissolve a marriageapply for/ask for/go through/get a divorceget/gain/be awarded/have/lose custody of the childrenpay alimony/child support (to your ex-wife/husband)