Simply, the Qur’an is the holy scripture of Islam, which Muslims recite, follow and seek guidance from. It is one of the three Abrahamic-Scriptures. The Bible and the Torah being the other two.
Qur’an is Arabic, and which has various meanings, such as ‘to recite,’ ‘to read,’ etc. Qur’an is a verbal noun and hence also means ‘the reading,’ or ‘recitation.’ As used in the Qur’an itself, the word means the revelation from Allah in the broad sense.