One addition is known as the beter, more popular name of the band one direction,
a band formed with Lewis(aulso often referred at as Tommo the tease), Harold, Nialler, Lime (or Lima whatever you prefer)and Zen Milk.
The band has in total 3 names: one direction, one subtraction and the most popular one,one addition.

A huge and diverse hood in San Francisco that is bordered by Haight, Pacific Heights, the 'Loin, and market. Fillmore is often considered part of the hood, but is distinct in its own right. The area is full of life with plenty of bars, restaurants, clubs, markets, specialty shops, and cannibis clubs. Everything is so compact that driving is unneccessary and droves of party prone people walk the streets at all hours of the night, a hipper neighborhood in San Francisco.

When one person in the group leaves and the group as a whole becomes better

The idea that you earn some major points as a medical student if you do an exceptional job and remain utterly enthusiastic while performing a seemingly mundane task such as pulling back tissue in surgery for your attending doctor.

1. Something that bitches don't know 'bout.

A fine addition is a lightsaber in the possession of General Grevious

it is a 'thing' that live on Earth just to kill you