The Register of Phraseologisms in Bulgarian Language covers the body of phraseologisms in Bulgarian language. It contains phraseological units, as defined by and found in the main Bulgarian phraseological dictionaries. The total number of the phraseological units is over 10,000, and the unique words – over 6,400. When searching in the register for a word, a list of all phraseological units containing the searched word (or a part of it) is composed. Each phraseological unit has a reference note to the source from which it was extracted. Thus, the register provides information on lexicographic editions, in which the meaning of the phraseological unit can be found.