My mother got in a taxi.
My younger sister is getting to look like our mother more and more.
My mother likes tofu and fugu.
The kanji and the word are exactly the same. That means they share meanings as well. This is the polite and humble form of mother. You use this when you're talking about your own mother to other people, especially if you aren't very close to them.
The reading is the kun'yomi reading, but this is the reading you learned with the kanji. Just remember, your mother is a terrible person and won't stop laughing at you: "HA HA HA HA HA!"