Learner's definition of DEPARTURE
1 : the act of departing: such as a : the act of leaving a place especially to start a journey
What is your time of departure?
Our departure is scheduled for 5 p.m. = Our departure time is 5 p.m.
They had to postpone (their) departure because of bad weather.
You should plan to arrive at the airport an hour before departure.
the ferry's departure point
[count] b [count] : the act of leaving a job, an organization, etc.
The departures of several key employees have caused problems for the company.
her sudden departure from the company
The team has struggled since the departure of its head coach.
2 [count] : a new or different way of doing something — often + from