Open English Wordnet
Nouns
(n)argumentation, logical argument, argument, line of reasoning, linea course of reasoning aimed at demonstrating a truth or falsehood; the methodical process of logical reasoning“I can't follow your line of reasoning”
(n)cable, line, transmission linea conductor for transmitting electrical or optical signals or electric power
(n)occupation, business, job, line of work, linethe principal activity in your life that you do to earn money“he's not in my line of business”
(n)channel, communication channel, line(often plural) a means of communication or access“it must go through official channels”, “lines of communication were set up between the two firms”
(n)line, product line, line of products, line of merchandise, business line, line of businessa particular kind of product or merchandise“a nice line of shoes”
(n)agate line, linespace for one line of print (one column wide and 1/14 inch deep) used to measure advertising
(n)credit line, line of credit, bank line, line, personal credit line, personal line of creditthe maximum credit that a customer is allowed
(n)tune, melody, air, strain, melodic line, line, melodic phrasea succession of notes forming a distinctive sequence“she was humming an air from Beethoven”
(n)line, dividing line, demarcation, contrasta conceptual separation or distinction“there is a narrow line between sanity and insanity”
(n)production line, assembly line, linemechanical system in a factory whereby an article is conveyed through sites at which successive operations are performed on it