1. Holding fast, or inclined to hold fast; inclined to retain what is in possession; as, men tenacious of their just rights. 2. Apt to retain; retentive; as, a tenacious memory. 3. Having parts apt to adhere to each other; cohesive; tough; as, steel is a tenacious metal; tar is more tenacious than oil. Sir I. Newton. 4. Apt to adhere to another substance; gl...
