Learner's definition of ARRIVAL
1 : the act of coming to or reaching a place : the act of arriving
They were awaiting the arrival of guests.
We checked into the hotel upon (our) arrival.
The flight's estimated time of arrival is 11:30. = The flight's estimated arrival time is 11:30.
When is the mail scheduled for arrival?
2 [count] : someone or something that has come to a place : someone or something that has arrived
◊ The phrase new arrival is often used to refer to a baby that has recently been born.
3 [noncount] : the time when something begins or happens
They are eagerly awaiting the arrival of their wedding day.
the changes that occur with the arrival of spring
the arrival of new technology