从语言学角度看,"قياس"(Qiyas)的含义是估量、衡量,或确定某物的长度、重量或品质,因此秤被称为"miqyas"(标尺)。作为法学术语,大多数乌莱玛将Qiyas定义为:"将原案(asl)的裁决(Hukm),因双方共有的有效理由('Illa),适用于律法未作规定的新案(far')。"11

The linguistic meaning of Qiyas is means estimation, measuring or ascertaining the length, weight, or quality of something, which is why scales are called miqyas. As a juristic term Qiyas the majority of Ulema have defined Qiyas as, „the application to a new case (far'), on which the law is silent, of the ruling (Hukm) of an original case (asl) because of the effective reason ('Illa) which is in common to both.‟11

以下是一个关于类比（Qiyas）的例子：

The following is an example of Qiyas:

“信道的人们啊!当星期五聚礼的召唤声响起时,你们就应当赶快去记念真主,放下买卖。这对你们来说是更好的,如果你们知道的话。礼拜完毕后,你们就可以散布在大地上,谋求真主的恩惠,并且要常常记念真主,以便你们得以成功。”(《古兰经》62:9-10)

“O you who have attained faith! When the call to prayer is sounded on the day of congregation (Friday), hasten to the remembrance of Allah, and leave all worldly commerce: this is for your own good, if you but knew it. And when the prayer is ended, disperse freely on Earth and seek to obtain Allah‟s bounty; but remember Allah often, so that you might attain to a happy state!” (TMQ al-Juma‟: 9-10)