قِيَاسٌ
1.
: see 1 and 3.
2.
[Used as a simple subst., Measurement.
3.
Comparison.
4.
Ratiocination.
5.
The premises of a syllogism, taken together: and also applied to a syllogism entire.
6.
Analogy: rule. You say, هٰذَا عَلَى القِيَاسِ
This is according to analogy, or to rule. And هٰذَا
عَلَى غَيْرِ قيَاسٍ
This is contrary to analogy, or to rule. And عَلَى قِيَاسِ كَذَا
After the manner of such a thing.]