The word almorzaban is the imperfect form of almorzar in the third person plural.
See the full almorzar conjugation

almorzar

¿Así que almorzaban de camino de vuelta a sus trabajos?
So they find their lunch on their way back to their desks?
Alguien que tenías acceso a su comida ya que almorzaban juntos todos los Domingos.
Someone who had access to his food since they had lunch together every Sunday.
Los soldados reales, vestidos de civil, rodearon la casa en la aldea de Dhanshar del distrito de Siraha, oriente del país, donde los camaradas almorzaban.
Royal Army soldiers in civilian clothes surrounded the house in the village of Dhanshar in Siraha District, eastern Nepal, where the comrades had lunch.
Todos los barítonos en el coro almorzaban juntos.
All the baritones in the choir ate lunch together
Mientras mis padres estaban en la universidad, almorzaban juntos todos los días.
While my parents were in college, they ate lunch together every day.
Repasaron el contrato mientras almorzaban para comprobar que todo fuera satisfactorio.
They reviewed the contract over lunch to make sure that everything was satisfactory.
Los jinetes amarraron los caballos junto al abrevadero mientras almorzaban.
The riders tied the horses up by the drinking trough while they had lunch.
Una vez a la semana, se encontraba con él y almorzaban en el parque.
She met him at the park for lunch once a week.
¿Tuvieron una conversación profunda mientras almorzaban? - No. Hablamos de la escuela y nada más.
Did you have a deep conversation over lunch? - No. We talked about school and that was it.
Want to Learn Spanish?
Spanish learning for everyone. For free.
SpanishDict Premium
Have you tried it yet? Here's what's included:
Cheat sheets
No ads
Learn offline on iOS
Fun phrasebooks
Learn Spanish faster
Support SpanishDict