open

verb (NOT CLOSED)

/ˈəʊ.pən/

/ˈoʊ-/

Definition

A1 [I or T] to move something to a position that is not closed, or to make something change to a position that is not closed: Could you open the window, please? You can open your eyes now - here's your present. The flowers open (out) in the morning but close again in the afternoon. From the kitchen there is a door that opens (out) into/onto the garden.informal "Open up (= open the door) - it's the police!" shouted the police officer, banging on the door.Unfastening and opening A2 [T] to remove or separate part of a container or parcel so that you can see or use what it contains: Don't open a new bottle just for me. I couldn't wait to open the letter.Unfastening and opening

(Definition of open verb (NOT CLOSED) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)