This is the 272nd most frequent French word.
militaire
"Militaire" means "military" or "soldier" in English.
In this sentence, 'militaire' is used as an adjective to describe something related to the military.
Le soldat portait un uniforme militaire.
The soldier was wearing a military uniform.
Here, 'militaire' is used as an adjective to describe a type of profession related to the military.
Mon frère a choisi une carrière militaire.
My brother chose a military career.
In this example, 'militaire' is used as a noun to designate a member of the armed forces.