Meanings

functioning cuff buttons on a jacket (i.e. those that can be buttoned and unbuttoned)

to open the door (to the world, women, etc.)

to open one's mouth (to talk)

to break up (e.g. a meeting)

to be separated (of clothing)

opening a government office (for the day)

to blossom

patent ductus arteriosus

open set

technological development

frontier spirit

to push open

open cluster

at close reach (sailing)

bargaining

to pull open

to achieve enlightenment

business development skills school

skill development school

development of potential ability