A more thorough explanation:

Definition:

Justifiable, adj. Capable of being legally or morally justified; excusable; defensible.

Examples:

• It was justifiable for the police officer to use force in order to protect themselves and others.
• Some people believe that lying is justifiable in certain situations, such as to protect someone's feelings.
• It is not justifiable to discriminate against someone based on their race or gender.

Explanation: The term "justifiable" refers to something that can be defended or excused based on legal or moral grounds. In the first example, the use of force by a police officer can be justified if it is necessary to protect themselves or others. In the second example, some people believe that lying can be justified in certain situations, such as to spare someone's feelings. However, in the third example, discrimination based on race or gender is not justifiable because it is morally wrong and goes against legal protections.