Synonyms and antonyms of Closed in American Thesaurus

closed (adjective)

if a door, window, lid, etc. is closed, it is covering an open area, passage, or hole

secure (adjective)

fastened firmly, in a safe way

sealed (adjective)

closed with a lid, cover, etc. so that nothing can get in or out

clenched (adjective)

closed tightly together

unopened (adjective)

not opened yet

shut (adjective)

closed

airtight (adjective)

not allowing air to enter or leave

hermetic (adjective)

physics closed tightly, so that no air can get in or out

up (adjective)

fastened or closed completely

under lock and key ()

in a room or container which is fastened with a lock