Quiet Time is a term used by Christians to refer to a designated time to spend and focus on God.
Quiet Time consists of three major things happening: Prayer, Biblical study, and meditation. Study Bibles are popularly used. During Quiet Time, the Christian will read and study a chapter, verse, or even book of their Bible. They will then pray to the Lord about anything and everything, and then meditate on what the verse was saying and what they think God is speaking for them.
Catholics, Orthodoxy, and Anglicans will designate a certain time in the day to say the Rosary or use other types of prayer beads, which falls under the title of Quiet Time.
Quiet Time is, in basic, a time in the day that is totally devoted to God with no outside distraction. Some denominations also will sing during Quiet Time.