All dictionaries arrange their information alphabetically. Each piece of information is called an entry.
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 each letter that follows decides which word comes first. For example, ant will come afterankle because the first two letters are the same but 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.
To find a word in an electronic dictionary you type it into a search box. The results will tell you everything a printed dictionary does. You can still browse through each letter if you want to.
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