de ˌcide a ˈgainst [transitive] [present tense I/you/we/they decide against he/she/it decides against present participle deciding against past tense decided against past participle decided against] phrasal verb
to not choose someone or something
In the end we decided against the house because it was too small.
Thesaurus: to make a decisionsynonym
Main entry: decide
Useful english dictionary. 2012.