名词

1. 邀请
An invitation is a written or spoken request to come to an event such as a party, a meal, or a meeting.

2. 请帖;请柬
An invitation is the card or paper on which an invitation is written or printed.

3. 诱因;招致…的行为
If you believe that someone's action is likely to have a particular result, especially a bad one, you can refer to the action as an invitation to that result.

1. a tempting allurement

e.g. she was an invitation to trouble

2. a request (spoken or written) to participate or be present or take part in something

e.g. an invitation to lunch
she threw the invitation away