1. the main or largest part of something
2. large size, mass, or volume
3. goods sold in large quantities without individual packaging

1. to increase in size or importance

Examples

• The bulk of the work was completed yesterday.
• The elephant’s bulk made it difficult to move through the narrow path.
• She bought rice in bulk to save money.
• The company decided to bulk up its security department.
• The bulk of students preferred the morning schedule.
• His bulk filled the entire doorway.
• Buying in bulk often reduces the cost per unit.