Enter word, and press Find :-)
Words you should use as search entries are case sensitive (usually lowercase, but proper nouns or German nouns are titlecase), and diacritic signs are important. If you do not have the ability to enter correct diacritics, you can select Input encoding Plain ASCII. Then the searching will disregard diacritics (and in some dictionaries will change to case insensitive). In Esperanto dictionary, it will expect words enterred using post-x method (sx cx gx jx hx ux), and in Russian-English dictionary it will expect words transliterated into ASCII.

Be sure to choose correct Input and Output encoding - utf-8 is ideal and supported by most modern browsers, but ASCII is a safe bet, if you have older browser or lack suitable fonts.

There are different searching strategies available: