Mirror
noun
The kanji and the word are exactly the same. That means they share meanings as well.
The reading is the same as the one you learned with the kanji.
ヘアブラシなら、鏡の前にあります。
If you're looking for a hairbrush, it's in front of the mirror.
あはは、ほっぺにケチャップついてるよ。鏡、見てきな！
Haha, you've got ketchup on your cheek. Go check in the mirror!
こんなところに手鏡が落ちてる。なんでだろう。
A hand mirror is lying here. I wonder why.