1. the quality or state of being large in size or volume; the characteristic of taking up much space
2. the quality of being unwieldy or difficult to handle or move because of size

Examples

• The bulkiness of the furniture made it hard to fit through the doorway.
• Despite its bulkiness, the winter coat provided excellent warmth.
• The bulkiness of old computers made them impractical for home use.
• She complained about the bulkiness of her backpack on the long hike.
• Modern smartphones have reduced the bulkiness that early mobile phones had.
• The bulkiness of the package required extra postage.
• Engineers worked to reduce the bulkiness of the engine without sacrificing power.