The definition of a bond is actually a debenture or a debt security. When a company needs the money she has an alternative to owe to the bank or to the general public through the capital market.
Bond is one investment opportunity that has lower risk than stocks because bonds have a payoff that is paid in exchange for the bond interest. In Indonesia, the famous Bond is Government Securities (SUN). This bond regarded as one of the safer investment opportunities as guaranteed by the government itself as a publisher.