Verb (5-dan, る, intransitive)
1. to lean (to one side); to incline
直線でも普通に飛ぶと、右側に偏ってしまう。Even when flying normally in a straight line, it drifts to the right.
2. to be unbalanced (e.g. diet); to be unduly weighted towards; to be concentrated on
やたら野菜に偏ってる。It's heavily skewed towards vegetables.
3. to be partial; to be biased; to be prejudiced
偏った思想をみんなに押し付けちゃダメです。You must not impose biased ideas on everyone.