Purpose There are no guidelines or consensus statements on the terms to be used when discussing withholding of treatment for patients in acute geriatric care units and who have not received palliative care. The objective of the present study was to analyze the terms used in medical records to refer to the withholding of treatment for patients who died in an acute geriatric care unit and did not receive palliative care. Methods We conducted an ambispective multicentre cohort study based on the DAMAGE study. Data on 53 patients who died in the acute geriatric care unit and who had not received palliative care were extracted from medical records. The verbatims referring to the withholding of treatment were analyzed in terms of keywords and then key concepts, as defined by several reviewers in a consensus-based approach. Results The mean age of the patients was 86.4 years, 34.1% were male. Terms referring to the withholding of treatment were found for 25 of the 53 patients (47.2%). Most of the decisions on the withholding of treatment were recorded in the week following admission to the acute geriatric care unit. Our analysis of the terms identified 11 key concepts: treatment limitation, no resuscitation, withholding diagnostic procedures, justification of care, ethical considerations, disease progression, uncertainty, the patient’s wishes, the family’s wishes, patient’s comfort, and collegiality. The terms used to describe key concepts varied markedly from one physician to another. Conclusion Decisions about the withholding of treatment are frequently noted in the medical records of patients who die in the acute geriatric care unit without having received palliative care. The broad variety of key concepts and differences in the choice of words highlight the need for standardized terms.