What is the meaning of Concurrence?

Agreement; concurring.

An instance of simultaneous occurrence.

competition (action of competing)

concurrence (instance of simultaneous occurrence)

the competition (the ensemble of competing business rivals)

inflection of concurrencer:

1. first/third-person singular present indicative/subjunctive
2. second-person singular imperative

first/third-person singular present indicative/subjunctive

second-person singular imperative

Source: wiktionary.org