Peace & Blessings
Question is what are the "Rukun Iman"?
Rukun; [Sin. Rukn or Rukun (Pillar), Pl. Arkan (Pillars)] means, generally as , A pillar, an essential part (or parts), fundamentals of faith, basic principle, other meanings in use are, support, foot of verse, precept, commandment, injuction, rule of action, maxims.
Iman; generally means Belief, faith, other meanings in use are, creed, trustworthiness, credence, conscience, confidence.
Hence literally "Rukun Iman" means "Pillars of faith", another almost same term is used popularly as "Rukun Islam" which means "Pillars of Islam" also popular as "Five Pillars Of Islam" can be seen in any encyclopedia.
Rukun Iman - "The Pillars Of Faith in Islam"
The Pillars of faith Iman in Islam are distinguished from the pillars of religion because they focus on the system of belief rather than merely ritual worship. They are also affected by Islamic law but guided mostly by somewhat esoteric truths of Islam. Of course a person cannot have complete faith without submission to the law. The "Pillars" or the truths upon which the Islamic faith is premised are:
Many scholars have written various explanations of these pillars. This list of the Pillars of Faith is accepted as basic to belief in Islam by every sect and school of thought. Many scholars have written various explanations of these pillars. This list of the Pillars of Faith is accepted as basic to belief in Islam by every sect and school of thought.
http://www.islamonline.net/iol-english/info/discover3.asp