The term 'horizon' can be defined as the line at which the sky and earth appear to meet, or the furthest visible point. The crossword solutions for this term include 'LIMIT' (5 letters), which refers to the boundary of what can be seen; 'PURVIEW' (7 letters), which means the range of something that can be seen; 'PROSPECT' (8 letters), which is a view or outlook; 'EXTENT' (6 letters), which is the degree or amount of something; 'KEN' (3 letters), which is an old English word meaning 'range of vision'; 'ZONE' (4 letters), which is an area or region; 'REACH' (5 letters), which is the DISTANCE something can be seen; 'DISTANCE' (8 letters), which is the amount of space between two points; and 'SKYLINE' (7 letters), which is the outline of buildings and other structures against the sky. Finally, 'LOST' (4 letters) can refer to the feeling of being unable to see beyond the horizon.