1) together with; along with (coexistence). 2) as X changes, Y changes as well; indicating that two things occur together or concurrently.
彼は妻とともにそのプロジェクトを進めた。
He worked on that project together with his wife.
年を取るとともに、体力が少しずつ落ちていく。
As one gets older, physical strength gradually declines.
技術の進歩とともに、生活は便利になった。
Along with technological advances, life has become more convenient.
子どもの成長とともに、親の考え方も変わることがある。
As children grow, parents' ways of thinking can also change.