0 past simple and past participle of open
2 to move something to a position that is not closed, or to make something change to a position that is not closed:
3 If a shop or office opens at a particular time of day, it starts to do business at that time:
4 to make something available:
5 If you open a computer document or program, you make it ready to read or use:
The Chairperson opened the proceedings with a short speech.
I just opened the drawer as usual and the handle came away in my hand.
The customs officials made us go through the whole rigmarole of opening up our bags for inspection.