Cases of word usage

1) the branch of mathematics in which signs and letters are used to represent quantities, as in 2A + 3A = 5A (algebra)

2) a fact, thing etc used to represent a group of similar ones (example)

3) a system of writing using a picture to represent a word or sound (hieroglyphics)

4) to regard or represent (something) as a person (personify)

5) (a document giving) authority to represent or act for another (especially in voting at an election) (proxy)

6) being or containing an example or examples (of another or others); consisting of elected members; a person elected or appointed to represent or act for others (representative)

7) a mark, object, symbol etc used to represent something: 'mathematical sings' such as '+', '-', 'x', '?'; a word or words, design etc on a board or plate to give a warning, or to give direction; to write (one's name) on (a letter, application form etc) (sign)

8) one used as an example; a part taken to represent the whole (specimen)

9) to represent or treat (art forms etc) in a particular, conventional style (stylize)

10) a sign, mark, object, etc used to represent something (symbol)