ho·ri·zon 
/həˈraɪzn̩/ noun
plural ho·ri·zons /həˈraɪzn̩/ noun 1 the horizon : the line where the earth or sea seems to meet the sky
▪ We sailed toward the horizon. ▪ The sun rose slowly over/above the eastern horizon. — see color picture 2 [count] a : the limit or range of a person's knowledge, understanding, or experience
▪ Reading broadens/expands our horizons.
b : the limit of what is possible in a particular field or activity
▪ These discoveries have opened up new horizons in the field of cancer research.
▪ We sailed toward the horizon. ▪ The sun rose slowly over/above the eastern horizon. — see color picture
▪ Reading broadens/expands our horizons.
b : the limit of what is possible in a particular field or activity
▪ These discoveries have opened up new horizons in the field of cancer research.
on the horizon
: coming in the near future
▪ Scientists believe that a major breakthrough is on the horizon.
▪ Scientists believe that a major breakthrough is on the horizon.
