breathhold noun 2verb 1forms 3 noun2 •The act of holding breath. •An instance of holding breath.Acquisition times can be long and prevent imaging within the time span of a single breathhold. — 2012 verb1 •To hold one's breath.If the patient was in a condition to breathold, this was done; however, due to the general condition of many of the patients studied, this was not always attempted. — 1995 formsbreathheld · breathholding · breathholds