1 almost, or very nearly, so that any slight difference is not important 差不多；几乎；实际上: The building is virtually finished. 那幢大厦差不多竣工了。

2 (computing计算机技术) by the use of computer programs, etc that make sth appear to exist （利用计算机程序）虚拟地: Check out our new hotel rooms virtually by visiting our website at ... 访问我们的网站，查看一下我们新旅馆房间的模样。