clingy definition: 1. used to describe something that sticks onto someone or something tightly: 2. A clingy person. Learn more. 2 (of a person) too emotionally dependent. ‘at about 18 months my son became very clingy’. More example sentences. ‘Where once she was outgoing and confident, now she is clingy and dependent.’. ‘If this week people are clingy and dependant, easily offended and insecure, don't be manipulated by their whims of steel.’. ‘She was.