The definition of anything means any object, person, topic or idea.
An example of anything is a person who will eat any type or kind of food.
any object, event, fact, etc.: do you know anything about it?
a thing, no matter of what kind: do anything you want
in any way; at all: is he anything like his father?
by no means; not at all
Any object, occurrence, or matter whatever.
To any degree or extent; at all: They aren't anything like last year's team.
Something or someone of importance: “You had to be something to start with, and Jeremy never was anything” (Anne Tyler).
- Any thing, written as two words, is now commonly used in contradistinction to any person or anybody. Formerly it was also separated when used in the wider sense. Necessity drove them to undertake any thing and venture any thing. --De Foe.