1. holdfast - Noun
2. Holdfast - Proper noun
Something used to secure and hold in place something else, as a long fiat-headed nail, a catch a hook, a clinch, a clamp, etc.; hence, a support.
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.
Source: Webster's dictionaryAs well as seeking sponsorships for the ride, the team will host a charity auction at Glenelg’s Holdfast Hotel on Friday night at 6pm, where people can buy their real estate services for, possibly, a fraction of their retail cost. Source: Internet
The forelimbs, according to Steller, were used as sort of a holdfast to anchor themselves down to prevent being swept away by the strong nearshore waves. Source: Internet
The rocky shores of Heard Island exhibit a clear demarcation between fauna of the lower kelp holdfast zone and the upper shore zone community, probably due to effects of desiccation, predation and freezing in the higher areas. Source: Internet