[hohld-fast, -fahst]
  1. something used to hold or secure a thing in place; a catch, hook, clamp, etc.
  2. Botany, Mycology. any of several rootlike or suckerlike organs or parts serving for attachment.

Origin of holdfast

First recorded in 1550–60; noun use of verb phrase hold fast
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for holdfast

Historical Examples of holdfast

British Dictionary definitions for holdfast


    1. the act of gripping strongly
    2. such a grip
  1. any device used to secure an object, such as a hook, clamp, etc
  2. the organ of attachment of a seaweed or related plant
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012