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a2

 
pronunciation:
uh [or] eI
part of speech: indefinite article
definition 1: any one of a group or kind.
Do you have a computer?Somebody call a doctor!A penguin cannot fly.Could you get me a spoon from that drawer?
definition 2: used to introduce one particular thing or person of a group or kind, but one which is not considered known to the listener.
A friend of mine called from London last night.They bought a new car.I have a brother who is two years older than I am.
definition 3: one, as a quantity.
The recipe calls for a teaspoon of cinnamon.