Dear student,
Hinderence is a thing that provides resistance, delay, or obstruction to something or someone.
In chemistry Steric hindrance is a consequence of steric effects.Or Steric hindrance is the slowing of chemical reactions due to steric bulk.
Where steric effects are non bonding interactions that influence the shape (conformation) and reactivity of ions and molecules.
Or, Please check it out
here.
Regards