As a Noun:
1. The part of each day between the time that people usually wake up and noon or lunchtime. English = morning.
Interactive:
1. Used alone to greet someone just after they have woken up or when you see them for the first time in the day if it is before noon or lunchtime. English = 'Good morning!', 'Morning!'
As Modifier:
1. Used at the beginning (or end) of a sentence to locate the action of that sentence in time; namely, in that part of each day between the time that people usually wake up and noon or lunchtime. English = in the morning.
2. Used next to a verb to indicate when that action happened; namely, in that part of each day between the time that people usually wake up and noon or lunchtime. English = in the morning.