word up exclamation 4verb 2forms 3 exclamation4 •(US) I approve; I agree. •(US) Hello. •(US) What's up?; what's happening?; what's the word? •(US) Listen up; pay attention!. verb2 •(informal) To inform (someone) of up-to-date information on a topic.You have to word up Jeremy on the party. •To pray, remain spiritually oriented and/or behave congruently with Christian doctrine. formsworded up · wording up · words up