[wʌns], (Adverb)

Definitions:
- on one occasion or for one time only
(e.g: they deliver once a week)

- at some time in the past; formerly
(e.g: Gran had once been a famous singer)

- multiplied by one
(e.g: once two is two)


Phrases:
- all at once
- at once
- for once
- once a —, always a —
- once and for all
- once and future
- once in a while
- once more
- once or twice
- once upon a time
- the once

Origin:
Old English ænes, from æne ‘once’, subsequently remodelled after Middle English ones, genitive of one. The spelling change in the 16th century was in order to retain the unvoiced sound of the final consonant

[wʌns], (Conjunction)

Definitions:
- as soon as; when
(e.g: once the grapes were pressed, the juice was put into barrels)


Phrases:
- all at once
- at once
- for once
- once a —, always a —
- once and for all
- once and future
- once in a while
- once more
- once or twice
- once upon a time
- the once

Origin:
Old English ænes, from æne ‘once’, subsequently remodelled after Middle English ones, genitive of one. The spelling change in the 16th century was in order to retain the unvoiced sound of the final consonant