[wɛn], (Adverb)

Definitions:
- at what time
(e.g: when did you last see him?)

- at or on which (referring to a time or circumstance)
(e.g: Saturday is the day when I get my hair done)


Phrases:

Origin:
Old English hwanne, hwenne; of Germanic origin; related to German wenn ‘if’, wann ‘when’
Old English hwanne, hwenne; of Germanic origin; related to German wenn ‘if’, wann ‘when’

[wɛn], (Conjunction)

Definitions:
- at or during the time that
(e.g: I loved maths when I was at school)

- after which; and just then (implying suddenness)
(e.g: he had just drifted off to sleep when the phone rang)

- in view of the fact that; considering that
(e.g: why bother to paint it when you can photograph it with the same effect?)

- although; whereas
(e.g: I'm saying it now when I should have told you long ago)


Phrases:

Origin:
Old English hwanne, hwenne; of Germanic origin; related to German wenn ‘if’, wann ‘when’