The word "plane" refers to a flat surface that has no thickness or depth. It can also describe a type of vehicle used for traveling through the air, like an airplane. Full definition
I slept half the flight, never been able to sleep on plane on other international flights. (seatguru.com)
This unique YA fantasy series inspired me to use the concept of planes of existence in a lot of my fantasy stories. (zedamadeo.com)
The airline must also overcome some technical challenges before it can begin selling the seats as a distinctly different category cabin across a wider variety of planes in its international fleet. (usatoday.com)