Means to 'strive'. There are two forms of jihad. The greater jihad is the daily struggle and inner spiritual struggle to live as a good Muslim. The lesser jihad is a physical struggle of 'holy war' in defence of Islam
A way of life; Muslims believe that God has set out a clear path for how Muslims should live. Shari'ah law is the set of moral and religious rules that put the principles set out in the Qur'an and the Hadith into practice
The revelations happened over 23 years, sometimes through Angel Jibril, sometimes through a voice, while Muhamed was in prayer and some in his day to day life