/ ˈrætɪfaɪ; NAmE / verb
( rati·fies , rati·fy·ing , rati·fied , rati·fied ) [ vn ] to make an agreement officially valid by voting for or signing it :
The treaty was ratified by all the member states.
► rati·fi·ca·tion / ˌrætɪfɪˈkeɪʃn; NAmE / noun [ U ]
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WORD ORIGIN
late Middle English : from Old French ratifier , from medieval Latin ratificare , from Latin ratus fixed, past participle of reri .