A portmanteau (//, //; plural portmanteaux or portmanteaus) or portmanteau word is a combination of two (or more) words or morphemes, and their definitions, into one new word. The word comes from the English portmanteau luggage (a piece of luggage with two compartments), itself derived from the French porter (to carry) and manteau (coat), which is a false friend of the French compound word porte-manteau meaning coat rack.
A portmanteau word fuses both the sounds and the meanings of its components, as in smog, coined by blending smoke and fog, or motel, from motor and hotel. In linguistics, a portmanteau is defined as a single morph which represents two or more morphemes.
"Portmanteau word" is used to describe a linguistic blend, namely "a word formed by blending sounds from two or more distinct words and combining their meanings." This definition overlaps with the grammatical term contraction, but a distinction can be made between a portmanteau and a contraction by noting that contractions are formed from words that would otherwise appear together in sequence, such as do and not, whereas a portmanteau word is formed by combining two or more existing words that all relate to a singular concept which the portmanteau describes. For example, Spanish and English create the portmanteau Spanglish.