1. In the military, holding one's rifle in a ready position above the head to allow for a run or charge. Leaping out of the transport, guns held at the high port, we ran across enemy fire to a makeshift shelter.

2. Of an object, held in a position of readiness or immediate action. The students held their pens at the high port, waiting for the instructor to signal them to begin the exam.

3. At an upturned and conspicuous angle or position. I'm having such a bad hair day, it's been at the high port since I woke up.

4. Immediately; at a moment's notice; without hesitation. I like to keep a suitcase packed so I am always ready to travel at the high port.