Outer
Definition 1 of 4
Pro Tip 1/3
Physical Boundaries
Use 'outer' to describe the furthest physical limit of objects or areas. The outer boundaries of the park were marked with fences.
Pro Tip 2/3
Visible Layers
Refer to 'outer' when speaking about layers you can see, like clothing or coatings. He put on his outer glove before stepping into the snow.
Pro Tip 3/3
Initial Impression
'Outer' can imply a surface-level perception before knowing more details. Her outer calmness hid her inner anxiety.