cling on verb 1cling-on noun 1forms 4 verb1 •To hold on tightly; to grip hard or adhere.In a summation of changed times, we have a lost station site in Bournemouth (now occupied by a coach park) as well as its former hotel (still clinging on as apartments). — 2021 cling-on noun1 •Synonym of cling (“type of window ornament”).Window cling-ons are the same kind you see at Christmas time, with cute Rudolph the Red-Nosed Reindeers and Frosty the Snow Mans on them. — 2003 formsclung on · clinging on · clings on · cling-ons