«فالأمر لغة: قول القائل لغيره على سبيل الاستعلاء: افعل»
Linguistically, a command is a speaker saying to another, in an authoritative manner, “Do it.”
«واصطلاحاً: إلزام الفعل على الغير»
Technically, it is requiring another person to perform an act.
The linguistic definition highlights the authoritative manner of speech; the technical definition highlights the binding demand. A polite request or advice is not automatically a binding legal command; context determines the force.