The two elephants in the Coat of Arms symbolises strength, service and humility.
The brown colour emphasises the unity of our skin and the soil. A clear testimony that we own the earth.
The cocoa tree symbolises agriculture and the natural resources of the land.
The Y on the shield represents River Niger and Benue which symbolise the link between State of Osun and the Federal Republic of Nigeria.
The lion stands for Yoruba nobility, dignity and courage while its cushion of ferns represents the traditional lair of an African Lion and the richness of our land.
The two symbols of the Chief’s sword (Ida) and The Mace embody the spirit and purpose of Osun. The Sword is the symbol of the Obas while the Mace is the symbol of the Legislative Arm of Government and the power of the common people as expressed by their elected representative.
The Ori Olokun stands for the common origin of the Yoruba and their dexterity in technology, while the garland surrounding it symbolises chivalry and triumph.
The Timber represents the vegetation as a rain forest zone. The Indigo colour (Aro) of the upper part of the shield symbolises the common Adire wear in Yorubaland while the Ruby Red colour (Alaari) of the lower part of the shield signifies nobility.
The Motto: Liberty & Service shows this are guaranteed for the people by the government while Justice is moral rightness based on fairness and equity to all irrespective of their status, gender or religion.
Reference
https://www.osunstate.gov.ng/about/state-symbols/