what is the entail and what is the impact on the bennet sisters and mother?

Entailment means a settlement of the inheritance of property over a number of generations so that it remains within a family or other group.Mr. Bennet is a landowner, but his estate is entailed away from his children under English law because he does not have a son. Upon his death, Longbourn will be inherited by his cousin, Mr. William Collins, a clergyman. This future provides the cause of Mrs. Bennet's eagerness to have her daughters married off to wealthy men.