deviation. 1  the act of deviating. 2  departure from a standard or norm. 3  Statistics. the difference between one of a set of values and some fixed value, usually the mean of the set. 4  Navigation. the error of a magnetic compass, as that of a ship, on a given heading as a result of local magnetism. 5  Optics.
The definition of an invitation is a request for a person's attendance at an event. An example of an invitation is a printed card asking family and friends to come to the sender's wedding. 1  an inviting to come somewhere or do something. 2  the message or note used in inviting.  enticement or allurement.
While email is nearly instant, a letter invitation takes at the most a week to 10 days, even overseas. The minimum time to mail a handmade or store-bought shower invitation is four weeks, with a phone, text or twitter RSVP deadline of two weeks to allow you to plan for food, favors and other party preparations.or a destination wedding or baby shower in a distant locale, a Save the Date card or magnet sent six to 12 months before the event--followed by the detailed invitation eight weeks ahead--will allow guests to book reservations early.