The word jacket comes from the French word jaquette. The term comes from the Middle French noun jaquet, which refers to a small or lightweight tunic.1 In Modern French, jaquette is synonymous with jacket. Speakers of American English sometimes informally use the words jacket and coat interchangeably.2
Field jacket, a jacket that is worn by soldiers on the battlefield or doing duties in cold weather. The field jacket came about during World War 2 with the US Army introducing the M-1941 and the M-1943 field jacket and issued the jacket to their troops. The most well-known and the most popular type of military field jacket that is on the market today is the M-1965 or M-65 field jacket which came into US military service in 1965.
Jean jacket or denim jacket, a jacket falling slightly below the waist, usually of denim, with buttoned band cuffs like a shirt and a waistband that can be adjusted by means of buttons. Also called Levi's jacket (see Levi's)
Manteau, a loose cloak or mantle, often used to refer to the long overcoats worn by women in Iran
Mess jacket or eton jacket, similar to a tailcoat but cut off just below the waist. Worn as part of mess dress and formerly as the school uniform of boys under 5'4" at Eton College until 1976 and at many other English schools, particularly choir schools3
Sport coat (US) or Sports jacket (UK), a tailored jacket, similar in cut to a suit coat but more utilitarian, originally casual wear for hunting, riding, and other outdoor sports; specific types include a shooting jacket and hacking jacket