Longman Dictionary of Contemporary English
Wiktionary
n. A session in which a photographer takes shots of an individual or group.
Wikipedia
A photo shoot is generally used in the fashion or glamour industry, whereby a model poses for a photographer at a studio or an outdoor location where multiple photos are taken to find the best ones for the required brief. The "model" is not always a person, however; for instance, advertising in print often requires photographic depiction of advertised goods, and food can be the subject of magazine articles (often in very elaborate presentations).
Usage examples of "photo shoot".
Eight white chaise lounges with blue Textilene cushions were arranged in two rows so perfectly one would think there was a photo shoot going on.
I had a photo shoot in Point Loma at four, but I thought Marshall (I figured that I should call him by his first name now) would've had to go into the office by now.
During the calendar photo shoot there had been so many bright lights that KC had barely seen Peter's face.
Heaven had seen pictures of Bob Daultman, but she couldn't believe he really wore a black turtleneck and beret when he wasn't at a photo shoot.
Tomorrow I have a major photo shoot with one of the top photographers in the country.
He was at an all-day photo shoot, so hopefully no one would mention it to him.