A defined contribution pension (DC) plan is a pension scheme in which participants themselves invest contributions paid for them based on their own judgement. Future benefits are dependent on the total contribution amount and investment results.
A defined contribution pension plan is also called "DC".
There are two types of DC: corporate-type DC, provided by a company as part of its corporate pension plans where contributions are made by a company, and individual-type DC (iDeCo), where participation is voluntary and contributions are made by a participant himself/herself.