Tajweed means to beautify the recitation of Holy Quran.
The Arabic word Tajweed linguistically means ‘proficiency’ or ‘doing
something well’. It comes from the same root letters as the word Jayyid,
which means ‘good’. When applied to the Quran, it means giving every letter
of the Quran its rights and dues of characteristics when we recite the Quran,
and observing the rules that apply to those letters in different situations.
We give the letters their rights by observing the essential characteristics of each
letter. We give them their dues by observing the characteristics of each letter
that are present in them some of the time and not present at other times.
The Quran was revealed with Tajweed rules applied to it. In other words,
when the angel Jibreel (Gabriel), may Allah exalt his mention, recited the
words of Allah to the Prophet Muhammad (peace be upon him) he recited
them in a certain way and he showed the Prophet the ways in which it was
permissible to recite the Quran. So, it is obligatory upon us to observe those
rules so that we recite it in the way it was revealed
Allah Almighty says in the Holy Quran that,
Recite the Holy Quran slowly, making the letters clear. (Quran 73:4)
Hazrat Bara bin Azib (RA) narrates that I heard Nabi (PBUH)
saying
"Beautify the Holy Quran with your voices, definitely beautiful voices enhance the beauty of the Holy Quran".