Apart is an adverb which means separated, with distance between by virtue of time, space or circumstance. Apart may also mean to the side, a distance away from the main group. Apart may be used as a noun to mean a person or thing that is recognizably different from other people or things. As an adjective, apart means not together, in pieces. Apart appears in the late fourteenth century, derived from Latin ad, meaning to, and pars, meaning a side.
A part means a piece of something, an amount that is a portion of a whole, a constituent. A part may also refer to an acting role, or the dialogue and stage directions that must be memorized in order to perform that role. A part is two words, “a” is an article which is a noun marker, “part” is the noun. Part first appears in the mid-thirteenth century to mean division, portion of a whole, from the Latin partem meaning a part, piece, a share, a division, a party or faction, a part of the body, a fraction, a function, office.
The pair plan to spend a lot more time together, catch up on the decades they spent apart and forget the past that kept them separated. (People)
The shocking moment a lion rips apart and EATS a helpless cub: Cannibal cat asserts its dominance on his pride in brutal fashion (The Daily Mail)
Instead, what sets it apart from its peers is that the company is built upon four core fundamentals, which CEO Bill Thomas hammered home on the company’s most recent quarterly conference call. (The Motley Fool)
A part of Manhattan’s immigrant past vanished with everything else on 9/11 (Newsday)
Rais Yatim: Local artists play a part in maintaining national harmony (The Star)
Apart from spending profits for brand building and expansion, India’s top 75 companies are also giving away a part of their profits for social causes (The Business Insider)