Next has 10 different meanings across 4 categories:
The one that follows after this one.
"Please hold your fire until the next soldier takes cover behind the wall."
In plain English: The next is the person or thing that comes right after someone else in line or order.
"Who is next in line for the promotion?"
Usage: Use "next" as a noun only when referring to the person or thing immediately following in a sequence, such as saying "it's your next." In most other cases, it functions as an adjective or adverb rather than a standalone noun.
nearest in space or position; immediately adjoining without intervening space
"had adjacent rooms"
"in the next room"
"the person sitting next to me"
"our rooms were side by side"
(of a day of the week) nearest (or nearest but one) after the present moment
"not this Saturday, next Saturday"
"on Tuesday next"
Nearest in place or position, having nothing similar intervening; adjoining.
"The next house on the street has a fence that is shared with our property."
In plain English: Next means coming immediately after something else in time or order.
"The meeting is scheduled for next Monday."
Usage: Use "next" to describe something immediately following another in sequence or physically touching it, such as the next house on the street. Avoid using it when referring to a future time period unless specifically indicating the immediate upcoming one.
In a time, place, rank or sequence closest or following.
"After finishing her morning coffee, she moved on to read the next chapter of her book."
In plain English: Next means immediately following something else in time, order, or position.
"I will see you next time."
Usage: Use "next" to describe the item or person immediately following another in a specific order, such as saying "the next bus." Do not use it to mean "very" or as an intensifier before adjectives like "next big thing."
Denotes the one immediately following the current or most recent one.
"After finishing dinner, we went to the next movie on the list."
On the side of; nearest or adjacent to; next to.
"The small café sits right next to the old library on that quiet corner street."
The word "next" comes from Old English, where it originally meant the superlative form of "nigh," essentially describing something nearest or closest. It traveled into Middle English and eventually modern English while retaining this core meaning of being immediately following in order or time.