Definition of holdfast
1 : something to which something else may be firmly secured
2a : a part by which a plant clings to a flat surfaceb : an organ by which a parasitic animal attaches itself to its host
Recent Examples of holdfast from the Web
The vine also produces holdfasts, and is consequently an excellent tree climber, growing aggressively upward, eventually strangling its host.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'holdfast'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of holdfast
Medical Definition of holdfast
: an organ by which a parasitic animal (as a tapeworm) attaches itself to its host
Seen and Heard
What made you want to look up holdfast? Please tell us where you read or heard it (including the quote, if possible).