Meaning: An aircraft with wings capable of flight, generally heavier than air and driven by jet engines or propellers.
The ASL signs AIRPORT and AIRPLANE seem to be the same, are they? If so, I suppose they rely upon the context in which they're used to determine the difference.
Answer: Yes, correct. It's also identifiable in a sentence. E.g. GO-to/DRIVE-to-IX1 AIRPORT. GET-in AIRPLANE or WAIT in-LINE ENTER AIRPLANE.
Review 101 words. Refresher.