incidental

/ˌin(t)-sə-ˈden-tᵊl/

adjective

  1. being likely to ensue as a chance or minor consequence

  2. minor

  3. occurring merely by chance or without intention or calculation

social obligations incidental to the job

noun

  1. minor items (as of expense) that are not particularized

  2. something that is incidental

noun

  1. descriptive music played during a play to project a mood or to accompany stage action