EASA's definition of “commercial operation” is as follows:
'Commercial operation' shall mean any operation of an aircraft, in return for remuneration or other valuable consideration, which is available to the public or, when not made available to the public, which is performed under a contract between an operator and a customer, where the latter has no control over the operator.
“non-commercial” has no specific definition but is classed as anything not falling into the remit of “commercial” as defined above.