Definition of top:
(n) :
that part of an object furthest away in the opposite direction from that in which an unsupported object would fall; the part viewed, or intended to be viewed, nearest the edge of the visual field normally occupied by the uppermost visible objects
"his kite got caught at the top of the tree."
(v) :
to
cover on the top or with a top; to
cut or
remove the top (as of a tree)
"she came top in her French exam."