| No. | Item | Definition |
|---|---|---|
| 1. | bar | barrier preventing entry |
| 2. | barricade | barrier blocking passage |
| 3. | barrier | obstacle that separates areas |
| 4. | blockade | barrier preventing movement |
| 5. | border | outer edge or dividing line |
| 6. | borderline | dividing line; point of transition |
| 7. | bound | a limiting line or point |
| 8. | brink | edge; verge of something |
| 9. | cap | upper limit; maximum |
| 10. | ceiling | upper limit or cap |
| 11. | confines | restricting limits of an area |
| 12. | constraint | something that limits or restricts |
| 13. | constraints | limits restricting action |
| 14. | contour | outline or boundary line |
| 15. | cordon | line restricting access |
| 16. | cutoff | point beyond which excluded |
| 17. | delimiter | thing that marks a limit |
| 18. | demarcated line | clearly marked dividing line |
| 19. | demarcation | line marking a division |
| 20. | divide | line or point of separation |
| 21. | divider | thing that separates two areas |
| 22. | dividing line | line separating two areas |
| 23. | division | separating line or boundary |
| 24. | domain | area of control or activity |
| 25. | edge | outermost part or margin |
| 26. | encircling line | line around something |
| 27. | enclosing line | line that encloses an area |
| 28. | enclosure | surrounding boundary or fence |
| 29. | endpoint | final point of a range |
| 30. | envelope | outer limits of performance |
| 31. | exclusion zone | area from which entry is barred |
| 32. | extent | range or outer limits |
| 33. | fault line | dividing line between groups |
| 34. | fence | barrier marking a boundary |
| 35. | fetter | constraint limiting freedom |
| 36. | floor | lower limit; minimum |
| 37. | fringe | outer edge or margin |
| 38. | frontier | border between regions or countries |
| 39. | gate | controlled entry boundary point |
| 40. | hedge | living boundary of shrubs |
| 41. | hedgerow | row of shrubs as boundary |
| 42. | interface | boundary where systems meet |
| 43. | join | place where two areas meet |
| 44. | junction | meeting point of boundaries |
| 45. | jurisdiction | area of legal authority |
| 46. | landmark | feature marking a boundary |
| 47. | limit | furthest point allowed or possible |
| 48. | limitations | restricting bounds or limits |
| 49. | line | mark dividing areas or limits |
| 50. | lot line | boundary of a land parcel |
| 51. | lower limit | lowest permitted point |
| 52. | march | border region between territories |
| 53. | margin | edge or border of something |
| 54. | marker | sign indicating a limit |
| 55. | maximum | highest allowable limit |
| 56. | meeting point | point where edges meet |
| 57. | minimum | lowest allowable limit |
| 58. | no-go zone | area beyond an enforced limit |
| 59. | obstruction | thing that blocks or separates |
| 60. | outer border | outside border of an area |
| 61. | outer edge | outside edge of something |
| 62. | outer limit | furthest extent |
| 63. | outermost line | furthest enclosing line |
| 64. | outline | outer line defining a shape |
| 65. | palisade | fence of stakes as barrier |
| 66. | parameters | limits defining what is allowed |
| 67. | parcel | defined piece of land |
| 68. | partition | divider separating spaces |
| 69. | perimeter | outer boundary line of an area |
| 70. | plot | small defined piece of land |
| 71. | property line | legal line of ownership |
| 72. | range | span between limits |
| 73. | reach | extent of influence or distance |
| 74. | red line | limit that must not be crossed |
| 75. | region | large area with boundaries |
| 76. | restricted zone | area with access limits |
| 77. | restrictions | limits placed on action |
| 78. | rim | outer edge of something |
| 79. | ring | circle marking an outer limit |
| 80. | scope | range of what is included |
| 81. | sector | defined part of an area |
| 82. | security zone | area with enforced perimeter |
| 83. | separating line | line that separates areas |
| 84. | separation | act or line of dividing |
| 85. | signpost | marker indicating a boundary |
| 86. | span | distance between two limits |
| 87. | terminus | end point of a line |
| 88. | territory | area under control or ownership |
| 89. | threshold | point where something begins |
| 90. | tract | defined stretch of land |
| 91. | ultimate limit | the furthest point allowed |
| 92. | upper limit | highest permitted point |
| 93. | utmost extent | the farthest reach |
| 94. | utmost limit | the greatest extent possible |
| 95. | utmost point | the farthest point reached |
| 96. | utmost reach | the farthest distance reached |
| 97. | verge | edge; point of beginning |
| 98. | wall | barrier forming an edge |
| 99. | watershed | dividing ridge between basins |
| 100. | zone | area with defined limits |