It means a real gesture. "Concrete" is something you can feel.
Student or Learner
I was watching a movie and i reached this sentence:
As a more concrete gesture of our gratitude we'd like to offer you a favor.
I want to know the meaning of "concrete gesture".
"Concrete gesture" means something more than mere words.
I am not a teacher.
They're not just thanking the person- they're offering the person a favour, something beneficial in return.