It's often used in phrases like:
* "sub noctem" meaning "under the night" or "during the night"
* "in noctem" meaning "into the night"
It's also used in some Latin phrases related to the night, like:
* "nox perpetua" (eternal night)
* "nox tenebrosa" (dark night)
* "noctem vigilare" (to watch through the night)
So, depending on the context, "noctem" could be translated as "night", "during the night", or something similar.