وَمَحْدُودٌ: وَهُوَ مَا يَكُونُ لَهُ حَدٌّ مُعَيَّنٌ، كَـ«يَوْمٍ» وَ«لَيْلَةٍ» وَ«شَهْرٍ» وَ«سَنَةٍ».
Translation: A delimited time noun designates a bounded unit, such as a day, night, month, or year.
The book gives all four examples: day, night, month, year. Each denotes a recognizable time unit.
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Al-Mafʿūl Fīhi: Adverbials of Time and Place
وَمَحْدُودٌ: وَهُوَ مَا يَكُونُ لَهُ حَدٌّ مُعَيَّنٌ، كَـ«يَوْمٍ» وَ«لَيْلَةٍ» وَ«شَهْرٍ» وَ«سَنَةٍ».
Translation: A delimited time noun designates a bounded unit, such as a day, night, month, or year.
The book gives all four examples: day, night, month, year. Each denotes a recognizable time unit.