What does "escape hatch" mean?

An emergency exit in a vehicle, aircraft, ship, or similar structure.

What is a synonym for "escape hatch"?

Common synonyms include: alternative, back door, back stairs, back way, bolt hole, bolt-hole.

noun

noun ·Uncommon ·Advanced level

Noun

1
An emergency exit in a vehicle, aircraft, ship, or similar structure.
2
hatchway that provides a means of escape in an emergency wordnet
3
A workaround to avoid a negative, often unintended, side effect of a positive change.
"What we need is progress with an escape hatch."

"What we need is progress with an escape hatch."