وهو قول مؤلف من قضايا يلزم عنها قول آخر بعد تسليم تلك القضايا.
A syllogism is a discourse composed of propositions from which another statement necessarily follows once those propositions are granted.
Composed of propositions points to connected premises. Another statement necessarily follows requires a logical connection, not a merely accidental or temporal association.
The phrase once the propositions are granted means that we provisionally accept the premises and examine what follows from them.