Definitions

1. adjective

not according to a regular or established procedure; unusual or unpredictable

“The nonroutine maintenance of the aircraft engine required specialized training.”

2. noun

a task or activity that does not follow a routine or standard procedure

“The nonroutine support provided by the IT team helped resolve the complex technical issue.”

3. adverb

in a nonroutine manner or way

“The team worked nonroutine to meet the tight deadline.”