To make or become faster or more active. The runner quickened his pace as he approached the finish line.
To stimulate or become stimulated; to arouse or become aroused. The news of the promotion quickened her interest in the project.
To reach a stage in pregnancy when movements of the fetus can be felt. She felt the baby quicken for the first time during her fifth month of pregnancy.
To make or become alive or reinvigorated; to revive or come to life. The smell of rain quickened the dry earth, bringing forth fresh shoots.