Informal A person given to joining groups, organizations, or causes.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "joiner" in a sentence
"However I have never been much of a 'joiner' - I'm not the follower kinda gal and have never embraced socialism or facism or even religion without some kind of balance."
"He was not a joiner, which is one of the reasons he was more revered than the existentialist and communist Jean-Paul Sartre, even though Sartre lived through and even participated in the sixties student movements."
"In the northern masters there is no appearance of what M. Ernest Dupuy calls the joiner-work of the French fictionalists; and there is, in the process, no joiner-work in Zola, but the final effect is joiner-work."