Having a clean and distinct outline / Accurately and precisely described or specified

epoch-making

plural of defining moment

A moment in time that defines something, such as a person's success or failure, achievement or demise, talent, etc.

Alternative form of defined benefits

Alternative form of defined contributions

(UK, pensions) Describing a pension scheme in which an employer agrees to provide a pension payment or lump sum on retirement that is based on the combination of the employer's and employee's contributions to the scheme over the employee's working life.

(UK, pensions) Describing a pension scheme in which an employer agrees to provide a pension payment or lump sum on retirement that is predetermined based on the employee's length of service, earnings history and age.

Poorly defined; blurry, out of focus; lacking a clear boundary. / (mathematics) Defined in an inconsistent way.

(computing) Created or defined by the user of a system, rather than being included in the original package.