Gravity has a familiar physical meaning but also a nonphysical meaningâbasically seriousness. Thus, something grave possesses gravity. You can refer to the gravity of a person's manner, though public figures today seem to have a lot less gravity than they used to have. Or you can talk about a grave situation, as in the example sentence.
A wiki is a website where users can add, remove, and edit every page using a web browser. It's so terrifically easy for people to jump in and revise pages that wikis are becoming known as the tool of choice for large, multiple-participant projects.
The Top 3 Wiki Sites For Teachers. 1  Wikispaces.com. Designed specifically for use in the classroom, wikispaces is a social writing platform that also acts as a classroom management tool by keeping teacher and students organized and on task. 2  Wikidot.com. At its most basic level, this website is free to users. 3  Pbworks.com.