Define bonding molecular orbital.

Explanation

### Step-by-Step Solution:

1. **Understanding Molecular Orbitals**:
- Molecular orbitals are formed when atomic orbitals from different atoms combine. This combination can lead to the formation of different types of molecular orbitals, including bonding and antibonding orbitals.

2. **Definition of Bonding Molecular Orbitals**:
- Bonding molecular orbitals are specific types of molecular orbitals that result from the constructive interference of atomic orbitals. This means that when two atomic orbitals combine, they can overlap in such a way that their wave functions add together.

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