simple past tense and past participle of close
"She closed the door behind her before locking it for the night."
In plain English: To close something means to shut it so that nothing can get in or out.
"The store will be closed early tonight for the holiday."
Usage: Use closed as the simple past or past participle of close to describe something that was shut at a specific time in the past, such as saying the store was closed yesterday. Do not use it for present states, which require the adjective "closed" followed by a form of "to be," like "the store is closed."
not open or affording passage or access
"the many closed streets made travel difficult"
"our neighbors peeped from behind closed curtains"
(set theory) of an interval that contains both its endpoints
"In real analysis, we often distinguish between open and closed intervals when determining whether a function attains its maximum value at the endpoint."
with shutters closed
"The house was quiet and dark because all the windows had their shutters closed."
Sealed, made inaccessible or impassable; not open.
"The emergency exit was found to be closed and blocked by debris during the fire inspection."
In plain English: Closed means shut so that nothing can get in or out.
"The store is closed so I cannot buy milk right now."
Usage: Use closed to describe something that is physically shut, blocked off, or unavailable for entry, such as a store that has finished business or a door that will not open. Do not use it to mean finished with a task, as in the phrase "the project is closed," which should instead be completed.
Derived from Old French clos, which comes from Latin clausus (past participle of cludere), it originally meant shut or covered up. The term entered English in the 14th century to describe something that is not open for entry or access.