赤
1
red;crimson;scarlet
信号機が赤の間は道路を渡るな。
Don't cross the road when the signal is red.
2
red-containing colour (e.g. brown, pink, orange)
3
Red (i.e. communist)
often written as アカ
サダムが脅威でないなどと言うのは、赤がかった反戦運動の人達くらい。
It's only the anti-war pinkos who say things like Saddam isn't a threat.
4
red light (traffic)
See also:
赤信号 (あかしんごう)
6
complete;total;perfect;obvious
See also:
赤の他人 (あかのたにん)
7
only applies to
赤
copper
See also:
銅 (どう)
8
red 5-point card
See also:
赤短 (あかたん)
Other forms
紅 【あか】 · 朱 【あか】 · 緋 【あか】 (word containing out-dated kanji or kanji usage)