Definition of "twice" []

• In two cases or on two occasions; two times: I rewrote the essay twice. (adverb)
• In doubled degree or amount: twice as many. (adverb)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I hadn't realised that C was still in the running though - it may require twice as many LOC, but it's ~twice as popular programmer wise?."
• "It is evident, therefore, that each year an immense number of birds must perish -- as many in fact as are born; and as on the lowest calculation the progeny are each year twice as numerous as their parents, it follows that, whatever be the average number of individuals existing in any given country, _twice that number must perish annually_, -- a striking result, but one which seems at least highly probable, and is perhaps under rather than over the truth."
• "Adverting to a project for forming a railway to Woolwich, by which passengers were to be drawn by locomotive engines, moving with twice the velocity of ordinary coaches, the reviewer observed: — “What can be more palpably absurd and ridiculous than the prospect held out of locomotives travelling _twice as fast_ as stagecoaches!"