Lafaz (perkataan) telah disediakan dalam bahasa untuk menunjukkan makna. Satu lafaz tunggal boleh menunjukkan satu makna sahaja, seperti: 'Baghdaad' menunjukkan makna kota yang dikenali dengan nama tersebut. Satu lafaz juga boleh menunjukkan banyak makna, seperti: 'Ain' (mata) yang menunjukkan makna 'Ain' air (mata air), 'Ain' yang melihat (mata), dan mata-mata (pengintip), antara makna-makna lain. Lafaz juga boleh menunjukkan dua makna atau lebih, seperti lafaz 'Ar-Rijaal' (lelaki-lelaki), kerana ia menunjukkan setiap orang yang padanya sifat 'Ar-Rajul' (lelaki) itu terhasil, dan ia juga boleh menunjukkan kepada makna yang ditunjuk (madlool) yang tersebar meluas dalam jenisnya (jins), seperti: 'Rajul' (seorang lelaki).

Alfaazh (wordings) have been provided within the language to indicate meanings. The single Lafzh can indicate one single meaning like: ‘Baghdaad’ is indicative of the meaning of the city that is known by its name. A Lafzh can also indicate many meanings like: ‘Ain’ (eye) which is indicative of the meaning of the ‘Ain of water (spring), the ‘Ain that sees (eye) and the spy amongst other meanings. The Lafzh can also be indicative of two meanings or more like the Lafzh ‘Ar-Rijaal’ (men) as it is indicative of everyone within whom the description of ‘Ar-Rajul’ (man) is realised and it could also indicate to an indicated meaning (Madlool) that is widespread within its type (Jins) like: ‘Rajul’ (A man).

Berdasarkan cara lafaz (ungkapan) ini disusun dan ditetapkan, lafaz-lafaz dibahagikan mengikut keluasan atau ketidakluasan maknanya kepada beberapa kategori, iaitu: Al-‘Aamm, Al-Khaass, Al-Mushtarak, Al-Mutlaq dan Al-Muqayyad.

Based upon this way that the Alfaazh (worded expressions) have been provided and set, the Alfaazh have been divided in respect to their comprehensiveness or lack of comprehensiveness into a number of categories which are: Al-‘Aamm, Al-Khaass, Al-Mushtarak, Al-Mutlaq and Al-Muqayyad.