Closed form may refer to:
Mathematics
- Closed-form expression, a finitary expression
- Closed differential form, a differential form <math>\alpha</math> whose exterior derivative <math>d\alpha</math> is the zero form <math>0</math>, meaning <math>d\alpha = 0</math>.
Poetry
- In poetry analysis, a type of poetry that exhibits regular structure, such as meter or a rhyming pattern
- Trobar clus, an allusive and obscure style adopted by some 12th-century troubadours