Burr – meaning of the word and examples

A whirring sound, such as a telephone ringing tone or the sound of cogs turning. (Oxford Dictionaries)

If someone has a burr, they speak English with a regional accent in which ‘r’ sounds are pronounced more strongly than in the standard British way of speaking. (Collins Dictionary)

A burr is the part of some plants which contains seeds and which has little hooks on the outside so that it sticks to clothes or fur. (Collins Dictionary)

A rough or prickly envelope of a fruit. (Merriam – Webster)

A plant that bears burs. (Merriam – Webster)

Examples

Noogoora burr control.

https://www.agric.wa.gov.au/herbicides/noogoora-burr-control

The difference between burr and blade coffee grinders. 

https://1912pike.com/mind-the-grind/