Entry 1 sense Webster, 1913 flavorless /flāv'-ẽrlˌ-ĕs/ · fla·vor·less · IPA /ˈfleɪvɚləs/ 01 a. Without flavor; tasteless. Opposite of flavorful. 1. Without flavor; tasteless. Opposite of flavorful. Syn. bland, flat, flavourless, insipid, savorless.