'out of sight' definitions:

Definition of 'out of sight'

(from WordNet)
adverb
No longer visible; "the ship disappeared behind the horizon and passed out of sight" [syn: out of sight, out of view]
adverb
Quietly in concealment; "he lay doggo" [syn: doggo, out of sight, in hiding]
adjective
Not accessible to view; "concealed (or hidden) damage"; "in stormy weather the stars are out of sight" [syn: concealed, hidden, out of sight]

Synonyms of 'out of sight'

From: Moby Thesaurus