e·quip·ment (ĭ-kwĭpʹmənt)n. 1. The act of equipping or the state of being equipped. 2. Something with which a person, an organization, or a thing is equipped. 3. The rolling stock especially of a transportation system. 4. The qualities or traits that make up the mental and emotional resources of an individual. Synonyms:equipment, apparatus, gear, materiel, outfit, paraphernalia These nouns denote the materials needed for a purpose such as a task or a journey: hiking equipment; laboratory apparatus; skiing gear; naval materiel; an explorer's outfit; a beekeeper's paraphernalia.