1. exactly; completely
Usage: informal

1. exactly vertical or perpendicular

1. to measure the depth of water or test if something is vertical
2. to work as a plumber; to install or repair pipes

1. a weight hung on a string to test if something is vertical

Examples

• The wall is perfectly plumb.
• I’m plumb tired after that long hike.
• The carpenter used a level to check if the post was plumb.
• They hired someone to plumb the new bathroom.
• The sailor used a plumb to measure the water’s depth.
• Make sure the fence posts are plumb before securing them.
• She was plumb amazed by the magic trick.
• The plumb line showed the wall was slightly crooked.