زَيْدٌ ضَارِبٌ أَبُوهُ عَمْرًا.
Translation: Zayd is one whose father is striking ʿAmr.
This example explains the phrase أَوْ صِفَةٌ in the definition. ضَارِبٌ is an active participle derived from ضَرَبَ يَضْرِبُ. Here it governs أَبُوهُ as its fāʿil and عَمْرًا as its object.