border

The line or frontier area separating political or geographical regions.countableuncountable

• The border between Canada and USA is the longest in the world.
• The Ministry of Defence said on Wednesday the men had been killed on Tuesday in the Nahr-e Saraj district of Helmand province, on the border of Kandahar just north of the provincial capital Lashkar Gah.

The outer edge of something.countableuncountable

• the borders of the garden

A decorative strip around the edge of something.countableuncountable

• There’s a nice frilly border around the picture frame.
• a solid border around a table of figures

A strip of ground in which ornamental plants are grown.countableuncountable

Border morris or border dancing.UKuncountable

A string that is both a prefix and a suffix of another particular string.countableuncountable

To put a border on something.transitive

To form a border around; to bound.transitive

To lie on, or adjacent to, a border of.transitive

• Denmark borders Germany to the south.

To touch at a border (with on, upon, or with).intransitive

• Connecticut borders on Massachusetts.

To approach; to come near to; to verge (with on or upon).intransitive

• Wit which borders upon profaneness […]deserves to be branded as folly.