Concrete

It is important to pour a solid foundation for every story you write. Using concrete language is one way to guarantee clear communication.

Here is a good definition found at: http://grammar.ccc.commnet.edu/grammar/composition/abstract.htm

Concrete terms refer to objects or events that are available to the senses. [This is directly opposite to abstract terms, which name things that are not available to the senses.] Examples of concrete terms include spoon, table, velvet eye patch, nose ring, sinus mask, green, hot, walking. Because these terms refer to objects or events we can see or hear or feel or taste or smell, their meanings are pretty stable. If you ask me what I mean by the word spoon, I can pick up a spoon and show it to you. [I can't pick up a freedom and show it to you, or point to a small democracy crawling along a window sill. I can measure sand and oxygen by weight and volume, but I can't collect a pound of responsibility or a liter of moral outrage.]