Suits come in 2 Versions (sometimes 3)
# 1 = Pants & a Jacket (it is the matching Jacket that by definition makes it a suit) this is known as a 2 piece suit
# 2 = As a 3 piece suit (traditional) with a matching or slightly contrasting vest.
# 3 = As a 4 pc suit (rare these days) would come identical to the 2 piece version I’ve described above, and with a 3rd Pair of Pants that often times would match the contrasting vest.
A Tuxedo by definition is somewhat like a suit but different.
The same in that it consists of a matching Pants & Jacket.
Different tho because it traditionally didn’t include a Vest, but rather a Cummerbund was used to cover the waistline (the look that James Bond made famous… see pic below)
Modern Tuxedos now often forego the Cummerbund and incorpate a Vest, matching or contrasting (often chosen to match the Woman’s Attire, or the Colour Scheme in the case of a Wedding)
Suits are part of a Menswear category known as Business Attire (generally speaking)
Tuexdos are part of a Menswear category known as Formal Attire
Formal Attire for men has very stringent rules on what is and isn’t appropriate for each occasion (or when an occasion is even worthy of formal wear). It can be a bit of an landmine to navigate… if a Bride wishes to follow this lead, then she is best advised to do a lot of research, reading & homework with her man to make sure he is properly dressed corresponding to the Rules of Etiquette.
(ie There are different Jackets, Shirts / Collars / Cuffs, Cummerbund vs Vest… as well as different options for Accessories… Ties, Suspenders, Shoes, etc)
Example, Tuxedos are typically worn after 6 PM (or as close to that hour as possible). In NA, Tuxedos are often seen as Wedding Attire no matter the hour. BUT in reality, if one is having a Morning or Afternoon Formal occasion, then the proper formal attire for a Man would be Morning Dress and not a “Black Tie” type of Tuxedo.
PHOTO – Prince William here is wearing Morning Dress, he has opted for the “Tails” version, but there is also the “Stroller” version of the Jacket that is shorter, and has a traditional cut to it similar to a man’s suit jacket.
Duncan a Male Bee we have here on WBee just recently had Morning Dress for his Daytime Wedding, and he looked fabulous
You can learn more about Formal Attire here:
Wikipedia – Black Tie = http://en.wikipedia.org/wiki/Black_tie
Black Tie Guide (Etiquette) = http://www.blacktieguide.com/Etiquette/Etiquette_BlackTie_Codes.htm
Hope this helps,