n. Intentness or zeal in the pursuit of anything; eagerness; strong or eager desire; energetic striving: as, to seek or ask with earnestness; to engage in a work with earnestness.n. Anxious care; solicitude; strength of feeling; seriousness: as, a man of great earnestness; the charge was maintained with much earnestness.n. Synonyms 1. Zeal, Enthusiasm, etc. See eagerness.