1. Godan verb with 'ku' ending, Intransitive verb

   1.

   to notice; to realize; to realise; to become aware (of)

2. 2.

   to regain consciousness; to come to (one's senses); to come round

Example sentences

• 販売価格が赤で書いてあることに気付く。

  I notice that the selling price is written in red.

• 歌詞を見てみれば、あまり意味が無いことに気付くでしょう。

  If you look at the lyrics, they don't really mean much.