allowable /əˈlaʊ.əbəl/adjective 5noun 1forms 3 adjective5 •Appropriate; acceptable. •Able to be added or deducted in consideration of something. •Permissible; tolerable; legitimate.New HISA regulations, implemented last month, include strict rules about withdrawal times and allowable medication levels on race day. — 2023 •Intellectually admissible; valid; probable. •(no longer used) Praiseworthy. noun1 •A permitted amount or activity. formsallowables · more allowable · most allowable