a principal pipe in a system that distributes water or gas or electricity or that collects sewage
"The plumber traced the leak to a crack in the main sewer line running beneath our driveway."
That which is chief or principal; the chief or main portion; the bulk, the greater part, gross.
"The winemaker carefully placed the freshly picked clusters into the large wooden main to begin fermentation."
A hand or match in a game of dice.
A basket for gathering grapes.
In plain English: A main is a large pipe that carries water, gas, or other liquids to many different places.
"The main of the ship became entangled in the fishing nets."
Usage: Use "main" as a noun only in very specific agricultural contexts to refer to a large grape basket. In almost all other situations, it functions as an adjective describing something primary or central.
Short for mainline (“to inject (a drug) directly into a vein”).
"The police raided the apartment after receiving an anonymous tip about someone who was planning to main heroin that night."
In plain English: To main something means to make it the most important part of a group or system.
Usage: Avoid using "main" as a verb in formal writing, as it is slang primarily referring to injecting drugs. In standard contexts, use the noun form to describe something primary or central instead.
(of a clause) capable of standing syntactically alone as a complete sentence
"the main (or independent) clause in a complex sentence has at least a subject and a verb"
Of chief or leading importance; prime, principal.
"The main reason we delayed the project was the unexpected storm that damaged our only bridge."
In plain English: Main means being the most important or primary part of something.
"The main reason we are late is that the car broke down."
Usage: Use "main" to describe the most important part of something, such as the main reason or main course. It functions as an adjective placed directly before the noun it modifies to indicate primary significance.
Exceedingly, extremely, greatly, mightily, very, very much.
"The main thing that keeps me up at night is worrying about my student loans."
In plain English: Main means primarily or mostly when used to describe something that is the most important part of a situation.
"The main thing is to stay calm during the exam."
Usage: Do not use "main" as an adverb to mean "very" or "extremely," as this is a common error; instead, use intensifiers like "mainly" for frequency or "primarily" for importance when modifying verbs or adjectives. Save the adjective form of "main" for describing something as most important or largest within a group.
A river in southern Germany, flowing from Bavaria to the Rhine.
"The main flows through the Black Forest before emptying into the Rhine near Basel."
The word "main" comes from Middle English, where it originally meant strong or principal. It traveled into modern usage as the primary term for a chief part, drawing its roots from Germanic words related to strength and power.