In The Philosophy of Language in Islamic Legal Theory Nora Kalbarczyk examines the influential jurisprudential work al-Mal f ilm ul al-fiqh (d. 1210). By means of a detailed analysis of the linguistic treatise of this work she highlights the impact of the philosophical tradition on Islamic legal theory (ul al-fiqh) in the so-called post-Avicennian era (11th-14th c.). Her main focus lies on a classification of signification (dalla) that can be traced back to Ibn Sn (lat. Avicenna, d. 1037): a word may signify a meaning by way of congruence (mubaqa), containment (taammun) or implication (iltizm). The author shows how Far ad-dn ar-Rz develops on the basis of the Avicennian theory of signification a hermeneutic toolbox which is not only relevant in the context of Arabic philosophy but also useful for different questions of Islamic legal theory.