UnscrambleTheWord.coboundary
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Is boundary a Scrabble word?
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- Scrabble US/Canada (OTCWL) Yes
- Scrabble UK (SOWPODS) Yes
- Wordle No
- Words With Friends Yes
Scrabble US/Canada (OTCWL) 
Wordle 
Words With Friends What is the meaning of boundary?
Definition
noun (English)
1. (figurative, often in the plural) the bounds, confines, or limits between immaterial things (such as one’s comfort zone, privacy, or professional sphere and the realm beyond)Examples: "I didn’t mean to push the boundaries by sending my boss a message on Saturday night."figurativelyin-pluraloften
2. (cricket) an edge or line marking an edge of the playing field
3. (cricket) an event whereby the ball is struck and either touches or passes over a boundary (with or without bouncing), usually resulting in an award of 4 (four) or 6 (six) runs respectively for the batting teamExamples: "Travis hit a boundary to seal the match on the last ball of the over."
4. (topology) (of a set) the set of points in the closure of a set S, not belonging to the interior of that set
5. (Philippines) commission paid by a bus or jeepney driver to a public transportation operator for taking passengers, or the excess collected fares taken as daily wagePhilippines
Definition source: Wiktionary