1. A work shift that occurs in the early part of the day, typically from early morning until midday or early afternoon
She works the morning shift at the hospital from 6 AM to 2 PM.
Ela trabalha no turno matutino no hospital das 6 da manhã às 2 da tarde.
2. In educational contexts, a class session held in the morning hours
The morning shift classes are held from 7 AM to noon.
As aulas do turno matutino são realizadas das 7 da manhã ao meio-dia.