1. The longitudinal position of a bone or limb. 2. The act of bringing into line. 3. In dentistry, the arrangement of the teeth in relation to the supporting structures and the adjacent and opposing dentitions. SYN: alinement. [Fr. aligner, to line up, fr. L. linea, line]
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align·ment (ə-līnґmənt) [Fr. aligner to put in a straight line] in dentistry, bringing natural or artificial teeth into line, so that they form the two regular parabolic curves of the dental arches and reestablish a harmonious relationship with the supporting structures and with the opposite dentition.Medical dictionary. 2011.