border border /ˈbɔrdɝ/

noun

1. () A line that indicates a boundary  ( borderline , boundary line , delimitation , border , mete )
   a line that indicates a boundary
    The fielder saved a certain boundary by jumping over the boundary line
   The fielder saved a certain boundary by jumping over the boundary line
   
   
2. () The boundary of a surface  ( border , edge )
   the boundary of a surface
     They stood at the edge of the cliff, marveling at the vastness of the ocean below.
   They stood at the edge of the cliff, marveling at the vastness of the ocean below.
   
3. () The boundary line or the area immediately inside the boundary  ( perimeter , border , margin )
   the boundary line or the area immediately inside the boundary
     The river formed a natural border between the two countries, separating them geographically.
   The river formed a natural border between the two countries, separating them geographically.
   
4. A strip forming the outer edge of something  ( border )
   a strip forming the outer edge of something
    The rug had a wide blue border
   the rug had a wide blue border
   
   
5. A decorative recessed or relieved surface on an edge  ( border , molding [ N. American] , moulding [Canadian, British] )
   a decorative recessed or relieved surface on an edge
   

verb

1. () Extend on all sides of simultaneously; encircle  ( environ , ring , skirt , border , surround )
   extend on all sides of simultaneously; encircle
    The forest surrounds my property
   The forest surrounds my property
   
2. () Enclose in or as if in a frame  ( border , frame in , frame )
   enclose in or as if in a frame
    Frame a picture
   frame a picture
   
3. () Form the boundary of; be contiguous to  ( border , bound )
   form the boundary of; be contiguous to
     With determination, she bounded over the hurdles on the track.
   With determination, she bounded over the hurdles on the track.
   
4. Lie adjacent to another or share a boundary  ( abut , border , butt on , adjoin , butt , butt against , edge , march )
   lie adjacent to another or share a boundary
    Canada adjoins the U.S.
   Canada adjoins the U.S.
    England marches with Scotland
   England marches with Scotland
   
5. Provide with a border or edge  ( border , edge )
   provide with a border or edge
    Edge the tablecloth with embroidery
   edge the tablecloth with embroidery