non ‧ ex ‧ ist ‧ ent /ˌnɒnɪɡˈzɪst ə nt◂ $ ˌnɑːn-/ BrE AmE adjective
[ Word Family: noun : ↑ existence ≠ ↑ non-existence , ↑ existent , ↑ existentialism , ↑ existentialist , ↑ coexistence ; adjective : ↑ existent ≠ ↑ nonexistent , ↑ existing , ↑ pre-existing , ↑ existential , ↑ existentialist ; verb : ↑ exist , ↑ coexist ]
something that is nonexistent does not exist at all, or is not present in a particular place
almost/virtually/practically etc nonexistent
On a Sunday morning traffic was almost nonexistent.
—non-existence noun [uncountable]