The dimensions of stress is

Stress is defined as “The restoring force per unit area of the material”. It is a tensor quantity. Denoted by Greek letter $\sigma$. Measured using Pascal.

$\Rightarrow \mathrm{stress}=\frac{\mathrm{Force}}{\mathrm{Area}}$

$\Rightarrow \mathrm{stress}=\frac{\left[ML{T}^{-2}\right]}{\left[L^2\right]}$

$\Rightarrow \mathrm{stress}=\left[M{L}^{-1}{T}^{-2}\right]$