As a Noun: 1. The highest point, part or surface of something. English = top. 2. The main thing in a particular situation. 3. The largest or biggest part of a thing in a particular situation. English = majority. As a Verb or Adjective: 1. To be located at the highest point, part or surface of something; to be at the top of. 2. To be located over or on the highest point, part or surface of something. English = (be) on top. 3. To be the most important thing in a particular situation. English = (be) main. 4. To be the largest or biggest thing in a particular situation. English = (be) major.