1. light (i.e. not heavy); feeling light (i.e. offering little resistance, moving easily)
なんか、体が軽くなった気がします。I feel like my body has become lighter.
2. light (i.e. of foot); effortless; nimble; agile
私は足取りも軽く、その場を後にした。I left the place with a light step.
3. non-serious; minor; unimportant; trivial
あの人にとって私はそれくらい軽いものだったんだ。That's how little I meant to that person.
4. slight; small; gentle; soft; easy; lighthearted (e.g. joke)
背中を軽く押されながら部屋へ入る。I enter the room while being gently pushed on the back.
5. easy; simple
こんな問題なら軽く解けるよ。I can easily solve a problem like this.
6. indiscriminate
彼は女の子なら誰にでも声をかける軽い男だ。He's the indiscriminate type who hits on any girl.
7. light (shape or stones); stones that are not solid but can be used to sacrifice to gain something elsewhere