army, navy and air force; land, sea and air forces
Refers collectively to the three branches of a nation's military. Often used in formal or organizational contexts.
A joint exercise of the army, navy, and air force was conducted.
He has experience serving in all three branches: the army, navy, and air force.
Refers specifically to the army or ground forces, not the combined branches.
Refers specifically to the navy.
Refers specifically to the air force.
Compound of 陸 (land), 海 (sea), 空 (air), and 軍 (military forces).