Vast (adjective)

1. Extremely large in scale or quantity.
2. Very great in amount or degree.

Origin:

Old english, from old norse vatns- "watery".

Examples:

1. The vast majority of people voted in favor of the proposal.
2. The vast majority of the land is covered by forest.
3. The company has a vast amount of experience in this field.
4. The vastness of the ocean is hard to comprehend.
5. The vast majority of the population is living in poverty.