A Nazirite (or Nazarite) was a Hebrew Israelite who made a special vow with God. This vow obligated the Nazirite to the abstention of alcohol,shaving or the dead. This was a voluntary vow of dedication that either a man or woman could swear if they chose to do so and was for a certain period of time. The regulations for Nazirites are recorded in the Law of Nazirite found in the Book of Numbers . The most notable example of is Samson, whose parents dedicated him since God allowed them to conceive despite being infertile. While Samson is the only Scripturally confirmed Nazirite, Samuel and John the Baptist are often suggested as Nazarites. Based on the prevalence of vows with the LORD, it is likely there were other Nazirites. If Samson, Samuel and John were all Nazirites this would suggest it was commonly used to dedicate the sons of barren mothers.
Abstention of Alcohol
Heads cannot be shaved
Nazarites also were allowed to use any razor or to shave their head, rather they must let their hair grow long. The long hair was to serve as a symbol of their dedication to God