(Britain) Waterproof rubber boots, intended to be worn in wet or muddy conditions. Short forms: wellies (singular welly or wellie)

(nautical) The process of cleaning the upper part of a ship's underwater hull and daubing it with a protecting layer of antifouling substance.

(rare in the singular) One of a pair of Wellington boots.

Alternative spelling of boottree

plural of ugg boot

(computing) A dedicated block usually at the beginning (first block on first track) of a storage medium that holds special data used to start a system. Some systems use a boot block of several physical sectors, while some use only one boot sector. Other manufacturers use the terms boot block and boot sector interchangeably.

(computing) A dedicated sector, usually at the beginning (first sector on first track) of a storage medium, that holds special data used to start a system.

(US) a wheel clamp or Denver boot / (Australia, New Zealand, Britain) the boot (trunk) of a car / (Britain) a car boot sale

(Canada, US) A device locked into place over the wheel of a road vehicle, immobilizing it.

Any of various verbs, generally in Romance languages, in which the first and second persons plural are affected differently by some phonological or morphological rule than the other four forms.