To mention something indirectly or briefly, without discussing it in detail.
“In her email, she alluded to some ongoing issues with the previous contractor.”
“The manager alluded to possible changes in staffing without giving specifics.”
In Reading Part 1, a writer may 'allude to' an issue, like a past problem, without fully explaining it. Recognizing this phrase helps with inference questions, since you must figure out what is being referenced from limited information.
Synonyms: refer to, hint at, mention briefly