This is the 757th most frequent French word.
concert
A musical performance given in public.
Concert in this sentence refers to a musical performance by a group or artist.
Je vais assister à un concert de jazz ce soir.
I am going to attend a jazz concert tonight.
Here, concert is used as part of the expression 'de concert', meaning 'in harmony' or 'together' in a collaborative effort.
Ils ont travaillé de concert pour résoudre le problème.
They worked together to solve the problem.
Concert refers metaphorically to the harmonious and collective sound created by the birds singing.