What is the meaning of Must?

To do as a requirement; indicates that the sentence subject is required as an imperative or directive to execute the sentence predicate, with failure to do so resulting in a failure or negative consequence.

To do with certainty; indicates that the speaker is certain that the subject will have executed the predicate.

Used to indicate that something is very likely, probable, or certain to be true.

Something that is mandatory or required.

The property of being stale or musty.

Something that exhibits the property of being stale or musty.

Fruit juice that will ferment or has fermented, usually from grapes.

To make musty.

To become musty.

Alternative form of musth

a must (necessity, prerequisite)

black (color)

Dark, without light, illumination (and poorly visible).

Without snow.

Having dark skin.

Dirty, unclean, full of garbage and/or grime.

Not requiring special skills, making something or someone dirty.

Grim, dreary, hopeless, without any (good) solution.

Illegal, unofficial, disgraceful.

The color black.

Something colored in black.

A person having dark skin.

must (something mandatory or required)

elative singular of

that which is compulsory; an obligation; duty; must

must-have (item that one must own)

must (sweet fresh grape juice that has not fermented yet)

black

must (wine that is not fully fermented)

fruit juice

black

black

unfermented wine; grape or other fruit juice

must (of grapes)

(drink made from) fruit or berry juice (that has been prevented from fermenting)

a kind of soft drink, more commonly known as julmust

must (new wine; sweet cider)

black (colour)

Source: wiktionary.org