Question

What is meant by space debris​

Answer 1

$\huge\pink{ᴀɴꜱᴡᴇʀ✰}$

Space debris is defined as all non-functional, artificial objects

It includes fragments and elements thereof, in Earth orbit or re-entering into Earth's atmosphere.

In short it could be term as "Space Junk".

I hope this may helps you...

Answer 2

Answer:

Space debris, also called space junk, artificial material that is orbiting Earth but is no longer functional. This material can be as large as a discarded rocket stage or as small as a microscopic chip of paint. ... Objects below 600 km (375 miles) orbit several years before reentering Earth's atmosphere.