The definition of proper is truly what something is said or regarded to be. It means genuine or true. It also means suitable, appropriate, and of the required type.
a proper uasage
proper termity castle
If you mean the species of tree, it is not a proper noun. However, if you were to name someone or something "Birch" - it is a proper noun.
No, it is not. It is a noun. It can mean either a wheeled conveyance (wagon, train car) or bodily posture.
belonging to [as a proper function or part]
what is proper activities
ignorance can be overcome for proper understanding
Proper usage and pronunciation.
proper termity castle
a proper uasage
In the appropriate order.
an abundant number is less than the sum of its proper divisors
If you mean the species of tree, it is not a proper noun. However, if you were to name someone or something "Birch" - it is a proper noun.
No, it is not. It is a noun. It can mean either a wheeled conveyance (wagon, train car) or bodily posture.
belonging to [as a proper function or part]
to belong as a proper function or part
maybe you mean a 'proper noun'