Axillary lymph node Meaning of Axillary lymph node: A lymph node in the armpit region that drains lymph from the breast and nearby areas. Also See: AIDS-defining cancer Vitamin C Antiepileptic Androgen Receptor Blocker Antisense Therapy ABVE-PC Antimitotic agent Alagille syndrome Abdominoperineal resection Antiangiogenic ALSO SEE: Adenocarcinoma in situ (AIS)