Antonym of Nocturnal Identified

The question asks for the antonym, or the word with the opposite meaning, of 'nocturnal'.

Understanding 'Nocturnal'

'Nocturnal' describes creatures or activities that are associated with or occur during the night.

Identifying the Antonym

The antonym for 'nocturnal' is a word that means associated with or occurring during the day.

• Diurnal: This word means active or occurring during the day. It is the direct opposite of 'nocturnal'.

Evaluating Other Options

• Normal: This means usual or standard, not related to time of activity.
• Abnormal: This means not usual or standard, also unrelated to the time of activity.
• Exceptional: This means unusually good or outstanding, unrelated to the time of activity.

Therefore, 'diurnal' is the correct antonym for 'nocturnal'.