Final answer:
A peer is someone who shares similar characteristics or is part of the same group. Your coworker who partners on projects with you often would be considered a peer.
Step-by-step explanation:
A peer is someone who is part of the same group or has the same characteristics as you.
In this case, your coworker who partners on projects with you often would be considered a peer because you both work together in a similar capacity. You share similar job responsibilities and work towards common goals.
Although your doctor and the barista at your favorite coffee shop may be friendly and helpful, they would not typically be considered peers. Your doctor is a professional who provides medical services, and the barista is a service provider at a coffee shop.
Learn more about Definition of a peer