context clue

WHAT ARE CONTEXT CLUES?
Text book writers usually know when they must use a word that will be new to their student readers. So they often include other words or phrases to help with the understanding of the new word. These words or phrases are referred to as context clues. They are built into the sentences around the difficult word. If you become more aware of the words around the difficult words you encounter in your reading, you will save your self many trips to the dictionary. You will be able to make logical guesses about the meanings of many words.
FOUR TYPES OF CONTEXT CLUES.

 1. examples
 2. synonyms and definitions
 3. antonyms and contrasts
 4. experience or sense of the sentence
WHAT ARE EXAMPLE CLUES
Using examples or illustrations, an author tries to show what a word means. A writer may give just one example or several. Remember that these examples are not synonyms. Look for words or phrases like "such as," "including," or "consists of." Colons (:) and dashes (-) can also signal examples.
HERE ARE SOME EXAMPLES CLUES 
The river was full of noxious materials such as cleaning agents from factories and pesticides from the nearby farms.
This third grade was full of precocious children. One child had learned to read at two and another could do algebra at age 6.
When going to an office party you should show your bestdecorum, for example, dress your best, drink and eat moderately, and be sure to thank the host before you leave.