On Thursday, Change UK leader Anna Soubry announced the party was adopting it in full.
She said: “Change UK and all our MPs stand in absolute opposition to antisemitism - in our values, our policies, and our practices.
“The resurgence in recent years of antisemitism within certain sections of British politics makes it incumbent on politicians of all persuasions to be unequivocal and uncompromising in our opposition to it.
“It is toward that end that without a moment’s hesitation, Change UK today proudly commits to adopting the IHRA definition of antisemitism in full, with all its examples.”
Board of Deputies President Marie van der Zyl said: “With antisemitism in the UK at record levels, it is incumbent on political parties to show that they take it seriously.
“Adopting the IHRA Definition of Antisemitism is a crucial step in that, and we welcome the fact that Change UK have adopted the Definition in full.”