open(adjective)

not shut, allowing entry or exit

an open box; The gate is wide open.

open(verb)

to make or become open

He opened the door; The door opened; The new shop opened last week.

open(adjective)

allowing the inside to be seen

an open book.

open(verb)

to begin

He opened the meeting with a speech of welcome.

open(adjective)

ready for business etc

The shop is open on Sunday afternoons; After the fog had cleared, the airport was soon open again; The gardens are open to the public.

open(adjective)

not kept secret

an open show of affection.

open(adjective)

frank

He was very open with me about his work.

open(adjective)

still being considered etc

Leave the matter open.

open(adjective)

empty, with no trees, buildings etc

I like to be out in the open country; an open space.