invitation

noun6

1. •
   the act of asking a person to be a guest at an event or in a home
2. •
   A document or verbal message conveying an invitation.

   • We need to print off fifty invitations for the party.
3. •
   Allurement; enticement.
4. •
   A line that is intentionally left open to encourage the opponent to attack.
5. •
   A bid that tells one's partner that game or slam is likely if their hand is at the strong end of what they have indicated.

   • I assume also that opener would have shown no interest in slam by either bidding 4NT or 50 after the slam invitation of 46. — 2001
6. •
   The brief exhortation introducing the confession in the Anglican communion-office.