defend

verb

1. 1.

   To resist an attack made on someone or something; to protect.

2. 2.

   To speak or write in favor of; to support or justify.

3. 3.

   (Law) To represent a defendant in a lawsuit or trial.

4. 4.

   (Sports) To protect one's goal or territory from the opposition.

5. 5.

   To attempt to retain a title or position.