A transfer between trains, buses, etc.; changing vehicles or lines (connection).
渋谷で山手線に乗り換えれば、もっと早く着きます。
If you transfer to the Yamanote Line at Shibuya, you'll arrive faster.
乗り換えの時間が短いので、急いでホームを移動した。
The transfer time was short, so I hurried across the platform.
この切符は2回までの乗り換えが可能です。
This ticket allows up to two transfers.
Switching to another ideology, party, system, or method; a change or conversion of allegiance or approach.
彼は以前の政党から別の党へ乗り換えた。
He switched from his former political party to another party.
多くの企業が紙の管理からクラウドへの乗り換えを進めている。
Many companies are switching from paper-based management to the cloud.
In finance: switching investments (changing stocks or funds from one to another).
投資家はリスク分散のために国内株から外国株への乗り換えを検討している。
Investors are considering switching from domestic stocks to foreign stocks to diversify risk.
In biology: chromosomal crossover (genetic crossing over), i.e., recombination during meiosis.
減数分裂の過程で染色体の乗り換え（交叉）が起きる。
Chromosomal crossover occurs during meiosis.