n. | 1. | Something used to secure and hold in place something else, as a long flat-headed nail, a catch a hook, a clinch, a clamp, etc.; hence, a support. |
2. | (Bot.) A conical or branching body, by which a seaweed is attached to its support, and differing from a root in that it is not specially absorbent of moisture. |
Noun | 1. | holdfast - restraint that attaches to something or holds something in place |