1Early or soon — at an early time, or before the usual/expected time. As in 早く起きる ('get up early') or 早く来て ('come soon'). Written 早く for this sense.
明日は会議があるので、早く起きなければならない。
I have a meeting tomorrow, so I have to get up early.
席を取りたいなら、早く来てね。
If you want to get a seat, come early.
風邪は早く治したほうがいいよ。
You'd better get over your cold soon.
早く春が来ないかなあ。
I wish spring would come soon.
2Quickly; rapidly; fast — describing high speed of motion or action, as in 速く走る ('run fast'). Especially written 速く for this sense.
もっと速く走れば、電車に間に合うよ。
If you run faster, you'll make the train.
彼はタイピングがとても速くて驚いた。
I was surprised at how fast he types.
この川は流れが速くて危ない。
This river flows fast and is dangerous.