sub·mer·sion \səbˈmər]zhən, -mə̄], -məi], ]sh-\noun (-s) Etymology: Late Latin submersion-, submersio, from Latin submersus (past participle of submergere to plunge under, submerge) + -ion-, -io -ion 1.: the act or process of submerging 2.: the quality or state of being submerged