Four words on an invitation quietly explain an entire system, and none of them are in a standard vocabulary list.

Wedding invitations run on a small set of practical terms. Here's what they actually mean before you have to guess.

Wedding vocabulary is oddly specific: a small cluster of words that almost never come up anywhere else, then appear all at once on an invitation you're expected to respond to correctly. None of it is complicated once explained, but none of it is intuitive from the words alone either, and getting one term wrong, replying when you shouldn't, or not replying when you should, can create real confusion for the people planning the event.

Five Terms You'll Actually See on an Invitation

Small vocabulary, real consequences if you read it wrong.

RSVP

A REQUIRED REPLY

From French répondez s'il vous plaît, meaning respond, please. It's not optional etiquette, it's a headcount the couple actually needs.

"Please RSVP by June 1st."

Plus-one

A GUEST YOU BRING

A guest allowance attached to your invitation, usually your choice of who to bring, though not every invitation includes one.

"Feel free to bring a plus-one if you'd like."

Registry

A GIFT LIST THE COUPLE MADE

A pre-selected list of items the couple actually wants, set up in advance so guests aren't guessing what to buy.

"Their registry is linked on the wedding website."

Regrets only

REPLY ONLY IF YOU CAN'T COME

The reverse of a normal RSVP: silence means you're attending, and a reply is only expected from guests who can't make it.

"Regrets only — we'll assume you're coming otherwise."

Save the date

AN EARLY HEADS-UP, NOT AN INVITATION

Sent months before the real invitation, just to reserve the day on your calendar. Details and a formal invite still come later.

"We'll send the full invitation closer to the date — for now, just save the date."

SILENCE CAN MEAN TWO OPPOSITE THINGS

On a standard invitation, no reply means you're not coming. On a "regrets only" invitation, no reply means you are.

The genuinely tricky part of wedding vocabulary isn't any single word. It's that a couple of these terms quietly flip the normal logic of a reply, and an invitation rarely slows down to explain which system it's using. Reading "regrets only" the same way you'd read a normal RSVP request produces exactly the wrong response, silence, when a reply was actually expected of you.

Before you reply to any invitation

Check specifically for the phrase "regrets only." If it's there, the reply logic is reversed from what you'd normally assume. If it isn't there, a standard RSVP by the given date is expected regardless of your answer.
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None of these five terms are difficult in isolation. What matters is catching them the first time an invitation uses them, since a missed RSVP deadline or a misread "regrets only" line isn't the kind of mistake you get to quietly correct later.

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