sequela UK /sɪˈkwiːlə/US /sɪˈkwɛlə/ noun3 •Chiefly in the plural: a condition or disease which follows chronologically after an earlier one, being either partly or wholly caused by it, or made possible by it.Complications: haematoma formation is a dangerous sequela of this operation, and careful drainage with polythene tubing was carried out. — 1970 •(formal) That which follows; a consequence, an effect. •(formal, rare) People who adhere to the opinions or teachings of another; followers. formssequelae · sequelae