up to fairly common adjective 1. busy or occupied with “what have you been up to?” “up to no good” Synonymsup to Similarbusy 2. having the requisite qualities for “equal to the task” “the work isn” Synonymsadequate tocapableequal toup to Similaradequate Related words Word family up-to-dateup toup to nowup-to-datenessup-to-the-minuteup to her neckup to his neckup to my neckup to our necksup to their necksup to your neck WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.