arda arc welding • ardassine · · · Info · Definitions · Characters · · arda · · Text Latin · · Script 4 · · Length 2 · · Syllables Definitions · · · (noun) an agency of the Intelligence Community that conducts advanced research and development related to information technology. Synonyms: Advanced Research and Development Activity, ARDA. · · Noun Definition 1 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 r latin small letter r U+0072