By far; much. An adverb indicating a large difference in degree (e.g., far better, much faster).
この新モデルは前のものよりはるかに性能が良い。
This new model is by far better-performing than the previous one.
彼の日本語はクラスの中で他の人よりはるかに上手だ。
His Japanese is by far better than other people's in the class.
この方法は以前のやり方よりはるかに効率的だ。
This method is much more efficient than the previous one.
Far away; distant. An adverb describing physical distance or remoteness.
山ははるかにかすんで、頂上は見えない。
The mountain is hazy far away; the summit can't be seen.
彼の故郷ははるか彼方にあるという。
They say his hometown is far away.
はるかに遠くの灯が夜空にちらついていた。
A light far away flickered in the night sky.
Long ago; long before. An adverb indicating a time far in the past.
その伝説ははるかに昔から語り継がれている。
That legend has been passed down from long ago.
人類の歴史ははるかに古い営みの積み重ねだ。
Human history is the accumulation of activities from long ago.