English: If you have a relation between y and its derivatives, say N derivatives, Nth order, then any relation between y, y^(′), ……., y^(n), and x relation between all these variables is actually called a differential equation.
Telugu: మీకు y మరియు దాని డెరివేటివ్ (derivative) మధ్య సంబంధం ఉన్నట్లయితే, Nth ఆర్డర్ డెరివేటివ్, అప్పుడు y, y^(′), …….