Each piece of information in a dictionary is called an 'entry', and the entries are arranged alphabetically.
For example, in an English dictionary you'll find words beginning with a at the front, and z at the back. Because there are lots of words beginning with a, the words are organised alphabetically according to the letters that follow the a. For example, the word alphabet will come before animal because the second letter l comes before the letter n. If the second letter in each word is the same, look at the third letters. The word ant will come afterankle because although the first two letters are the same, the third letter is different, and t comes after k in the alphabet.
To find the word 'sunny', start by finding words beginning with s, then su, then sun until you eventually narrow it down to sunny.
The most widely used electronic dictionaries are found on the internet. Finding a word is easy, you type the word into a search box, press 'enter', and the results are shown. The results will tell you everything a printed dictionary does. There is often also an option to hear how the word is pronounced (what it sounds like).
You can still browse through each letter if you want to.
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