Definition of tenacious

• a. - Holding fast, or inclined to hold fast; inclined to retain what is in possession; as, men tenacious of their just rights.
• a. - Apt to retain; retentive; as, a tenacious memory.
• a. - Having parts apt to adhere to each other; cohesive; tough; as, steel is a tenacious metal; tar is more tenacious than oil.
• a. - Apt to adhere to another substance; glutinous; viscous; sticking; adhesive.
• a. - Niggardly; closefisted; miserly.
• a. - Holding stoutly to one's opinion or purpose; obstinate; stubborn.