To Turn Something On
To Switch Something On, To Light Something Up
transitive verb, ichidan verb
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb.
The kanji itself means point so the verb version is something you need to point your finger to do. Picture pointing your finger and pushing a lightswitch to turn something on, in this case the light. You won't be able to switch something on if you can't point your finger.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you:
You aren't able to turn the light on with just one finger though, you need to use two (つ). Either you have really weak fingers, or that's a really strong lightswitch. Either way, you need two fingers to switch on the light.
火を点ける
to light a fire
テレビを点ける
to turn on the TV
ライトを点ける
to turn on the light
夜は車のヘッドライトを点ける。
I put the car headlights on at night.
今すぐテレビを点けてください。
Please turn on the TV immediately.
ニュースをチェックするために、ラジオを点けました。
I turned on the radio to check the news.