1. the bottom part of a doorway; the entrance or beginning point
2. the point at which something begins or changes; a critical point or level
3. the minimum level or amount required for something to happen or take effect
Usage: often used in scientific or technical contexts

Examples

• She paused at the threshold before entering the room.
• We are on the threshold of a new era in technology.
• The country stands at the threshold of economic recovery.
• He has a low pain threshold.
• The noise level exceeded the threshold for hearing damage.
• Cross the threshold and you’ll be officially inside.
• The tax threshold was raised to help middle-class families.