Look at these negative sentences:
Je n'ai aucune idée!I have no idea!
Tu as une soeur? Aucune!Do you have a sister? None!
Il n'aime aucun programme de télé-réalité.He likes no TV-reality show.
Nous n'avons acheté aucune voiture.We bought no car.
The construction ne… aucun/aucune + [thing] means none or not one, or no [thing].
Note that aucun must agree in gender with the thing it refers to
aucun/aucune never agree in number (singular/plural): as they describe an absence of things, they're always singular
See also the more advanced Aucun/e … ne = None of them (negation)
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