This is the 914th most frequent French word.
convention
An agreement, contract, or established practice.
Here, 'convention' refers to a gathering or meeting of a group of people, specifically scientists, to discuss their work or ideas.
La convention annuelle des scientifiques aura lieu en juin.
The annual convention of scientists will take place in June.
Here, 'convention' denotes a formal agreement, treaty, or protocol between parties, in this case, related to environmental protection.
Ils ont ratifié une convention pour protéger l’environnement.
They ratified a convention to protect the environment.
In this context, 'convention' means a generally accepted practice, rule, or norm in a particular culture, field, or activity, such as language usage.