From Longman Dictionary of Contemporary Englishon lineon linea) using a computer to get information or to communicate with people You can book tickets on line. Most of our sales staff now work on line. → online b) working properly as planned a new nuclear reactor which should be on line by 2005 If there is a power failure, the emergency generators should come on line within 15 minutes. → line
Examples from the Corpus
on line• All the classrooms are now on line. 