As a Noun: 1. ADENOIDS are enlarged lymph nodes between throat and back of nose, can block nose, make it hard to breathe and speak. This happens in children more than adults. Note: 1. There appears to be no commonly used Auslan sign for ADENOIDS. If you know a sign for ADENOIDS used by you or other Auslan users (deaf people or interpreters) please go to "missing sign feedback" and supply details. Thank you.