air force
n. countable B1 Intermediate
n. the part of a country's military that fights in the air using planes and helicopters.
n. the branch of a nation's military forces primarily responsible for aerial warfare and air defence. Typically functions as a collective noun.
He joined the air force to become a pilot.
The nation's air force was called in to provide emergency supplies to the flooded regions after the roads became impassable.
Modern strategic doctrine often emphasizes the necessity of maintaining air force superiority to protect ground operations and ensure the integrity of national borders during conflicts.
Usage
Often capitalized as 'Air Force' when referring to a specific national organization (e.g., the Royal Air Force).