boundary

Everyday

1. A boundary is a line that marks the edge of an area, like a field, a country or a garden. tree →
2. In cricket, the boundary is the edge of the field; hitting the ball over or to it scores 4 or 6 runs. tree →
3. Boundaries are limits on what is OK to do, like personal boundaries. tree →

In the lessons

In maths, the boundary of a shape is its edge; its length is the perimeter. In geography, boundaries between countries or counties. In PSHE, setting boundaries keeps you safe. In cricket problems, boundaries are fours and sixes. Phrases: hit a boundary, cross the boundary, set boundaries, push the boundaries.

Examples

• The river is the boundary between the two towns. tree →
• Stay inside the playground boundary. tree →
• He hit a boundary for four runs. tree →
• The perimeter is the length of the boundary of a shape. tree →
• It's okay to set boundaries with friends. tree →
• The fence marks the boundary of our garden. tree →
• She scored 3 fours and 2 sixes, so 24 runs in boundaries. tree →
• The kids pushed the boundaries by staying up late. tree →
• Storks and pelicans flew after him in feathery bands, to accompany him to the boundaries of the garden. tree →

Note

Plural: boundaries (y → ies). Spelling trap: b-o-u-n-d-a-r-y (often misspelled "boundry"). In maths, "boundary" length = perimeter.

In Jewish tradition

Interpretation: In Sefer Yetzirah the boundary is the limit God sets for the world, which stretches out forever. Tradition reads this as God being the start and the end of all. Job says God drew a boundary on the face of the waters, where light meets darkness, which the tradition reads as God's order in creation. In the primary lessons: In maths, the boundary of a shape is its edge; its length is the perimeter. In geography, boundaries between countries or counties. In PSHE, setting boundaries keeps you safe. In cricket problems, boundaries are fours and sixes. Phrases: hit a boundary, cross the boundary, set boundaries, push the boundaries.

Examples

• 9) In God is the beginning and he is the boundary of the Universe. (Sefer Yetzirah, Kalisch 1877) tree →
• They grew wider and wider to all eternity, and these are the boundaries of the world. (Sefer Yetzirah, Kalisch 1877) tree →
• He hath described a boundary upon the face of the waters, unto the confines of light and darkness. (Writings JOB.26.10, JPS 1917) tree →

Note

Plural: boundaries (y → ies). Spelling trap: b-o-u-n-d-a-r-y (often misspelled "boundry"). In maths, "boundary" length = perimeter.

Meaning