Semicha (, "leaning [of the hands]"), also semichut (, "ordination"), or semicha lerabbanut (, "rabbinical ordination") is derived from a Hebrew word which means to "rely on" or "to be authorized". It generally refers to the
ordination of a
rabbi within
Judaism. In this sense it is the "transmission" of rabbinic authority to give advice or judgment in
Jewish law. Although presently most functioning
synagogue rabbis hold semicha by some rabbinical institution or academy, this was until quite recently not always required, and in fact many
Haredi rabbis may not be required to hold a "formal" semicha even though they may occupy important rabbinical and leadership positions.
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