Meaning of よかろう in Japanese

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Definition of よかろう

よかろう(yokarou) 【良かろう ·好かろう ·善かろう】

彼かれなしで始めてもよかろう。

We may as well begin without him.

Since you're here, we might as well begin.

もう大学生だいがくせいなのだから、もっと分別ふんべつがあってもよかろう。

Now that you are a college student, you should know better.

もう出かけるでかける方がよかろう。

I may as well go now.

We had better go home rather than wait here.