Eastbound/ˈiːstbaʊnd/ Definition 1 of 2Pro Tip 1/3Traffic Reports Often used in traffic news to indicate congestion or travel direction in a specific area. Tune in for eastbound traffic updates on I-90. Pro Tip 2/3Journey Planning Used to describe the direction you should follow or a lane you need to be in. Keep right for the eastbound turn-off towards the city center. Pro Tip 3/3Localized Context Eastbound's meaning can change depending on your current location and destination. We're eastbound from the mountains, but westbound to the plains.