1) a way of entering or getting near (approach)

2) to cause (a person) to die or be very ill by stopping enough air from entering the lungs (asphyxiate)

3) the surrounding of a place e.g. by armies or warships, to stop goods or people from entering or leaving (blockade)

4) the two main branches into which the wind-pipe divides before entering the lungs (also called bronchial tubes) (bronchi)

5) a quantity, number etc entering or taken in (during a given period) (intake)

6) to prevent workers from entering a factory etc, e.g. during an argument between management or owners and the workers (lock out)