V1

noun (plural Vs or V's)

• 1the twenty-second letter of the alphabet.
• denoting the next after U in a set of items, categories, etc..

• 2 (also vee) a shape like that of a letter V: [in combination]:deep, V-shaped valleys
• [as modifier] denoting an internal combustion engine with a number of cylinders arranged in two rows at an angle to each other in a V-shape:a V-engine a 32-valve V8 power plant

• 3the Roman numeral for five.