Meaning of ちらと in Japanese

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Definition of ちらと

ちらっと(chiratto) · ちらと(chirato)

どちらとも(dochiratomo) 【どちら共】

(n) both →Related words: 共
柔らかいウールの方が粗いウールより高価で、そのどちらともナイロン製の人工繊維より上等である。
Soft wool is more expensive than coarse wool and both are superior to synthetics made of nylon.

I haven't decided either way. I want to keep an eye on how things go.

彼のかれ息子むすこ達たちのどちらとも彼のかれ家業かぎょうを継ぎつぎたがらない。

Neither of his sons wants to succeed to his family business.

これとそちらとの違いちがいは何だい。

What is the difference between this and that?