closed adjective (NOT ACCEPTING IDEAS) - definition in British English Dictionary & Thesaurus - Cambridge Dictionary Online
Q: Which one of these is correct: “home school” or “home-school” or “homeschool”? Also, is “homeschooler” one word, two, or hyphenated?
A: The American Heritage Dictionary of the English Language (4th ed.) lists both “homeschool” and “home-school,” in that order, for both the noun and the verb.
Merriam-Webster’s Collegiate Dictionary (11th ed.) gives only the closed version, “homeschool,” as well as “homeschooler” and “homeschooled.” (M-W says a “homeschooler” is a parent who homeschools or a child who’s homeschooled.)
Does "the closed version" mean exactly what has been defined below? To me, I prefer HanibalII's version over the dictionary one since the former is easy to be memorized.
This is an inexact science- words start as pairs, then acquire a hyphen and merge as they become better known.