This means the beginning of God's harvest, and also carries the idea of a consecrated offering.

After their deliverance from Egypt, the Israelites were instructed to acknowledge God's goodness to them in providing them with their daily food. They were to make an offering to Him of the first ripe fruits of the land. The first crop to ripen each year was the barley, and a sheaf of barley was ceremonially offered to God after the feast of the Passover. Fifty days later at the feast of Pentecost, loaves made from the first ripe wheat were also offered (see Leviticus 23:5-14).

Paul speaks of Christ as 'the firstfruits' meaning that Jesus was the first to be raised from the dead, and that we in due time would be the main harvest:

"But Christ has indeed been raised from the dead, the firstfruits of those who have fallen asleep…. For as in Adam all die, so in Christ will all be made alive. But each in his own turn: Christ, the firstfruits; then, when he comes, those who belong to him." (1 Corinthians 15:20, 22-23).

Faith
  1. Trust
  2. Belief
Fall
Fast
Father
Fear
Fellowship
First Born
The "firstborn from the dead"
First fruits
Flesh
Fool
Forgive, Forgiveness
Foundation (Stone)
  1. The foundation of the earth
  2. The foundation of faith
Fulfil