See also: fullhearted English Alternative forms fullhearted Etymology From full + hearted. Adjective full-hearted (comparative more full-hearted, superlative most full-hearted) Wholehearted. Full of courage or confidence. Elated. Full of emotion; too much moved for full self-control. Derived terms full-heartedly full-heartedness See also halfhearted Wikiwand - on Seamless Wikipedia browsing. On steroids.