Dive meaning : A jump or plunge into water. A headfirst jump toward the ground or into another substance. A downward swooping motion. A swim under water. A decline. A seedy bar, nightclub, etc. Aerial descent with the nose pointed down. A deliberate fall after a challenge. To swim under water. To jump into water head-first. To jump headfirst toward the ground or into another substance. To descend sharply or steeply. (especially with in) To undertake with enthusiasm. To deliberately fall down after a challenge, imitating being fouled, in the hope of getting one's opponent penalised. To cause to descend, dunk; to plunge something into water. To explore by diving; to plunge into. To plunge or to go deeply into any subject, question, business, etc.; to penetrate; to explore.