1the morning — the early part of the day, from sunrise until shortly before noon. The basic meaning of あさ; can also be used adverbially (朝に~, 朝から~). Note that 今朝 (this morning) is an irregular reading: けさ, not いまあさ.
毎朝六時に犬を散歩させる。
I walk the dog at six every morning.
朝は道が混むから、いつもより早く家を出た。
Mornings get crowded, so I left home earlier than usual.
朝から雨が降り続いている。
It's been raining since the morning.
私は朝に強くて、夜は早く眠くなる。
I'm a morning person — I get sleepy early at night.
2an informal use of 朝 short for 朝食 / 朝ごはん (breakfast). Used in casual contexts like 朝は何にする？ (what should we have for breakfast?) or 朝抜き (skipping breakfast) when the meaning is clear from context.
朝は何にする？トーストとコーヒーでいい？
What do you want for breakfast? Toast and coffee okay?
朝抜きは体に良くないよ。
Skipping breakfast isn't good for you.
ホテルの朝はバイキング形式だった。
Breakfast at the hotel was buffet-style.