<p><strong>Noun</strong></p><ul><li>the act or state of touching; a touching or meeting, as of two things or people.</li><li>immediate proximity or association.</li><li>an acquaintance, colleague, or relative through whom a person can gain access to information, favors, influential people, and the like.</li><li>Electricity: a junction of electric conductors, usually metal, that controls current flow, often completing or interrupting a circuit.</li><li>Geology: the interface, generally a planar surface, between strata that differ in lithology or age.</li><li>Medicine/Medical: a person who has lately been exposed to an infected person.</li><li>Sociology: a condition in which two or more individuals or groups are placed in communication with each other.</li><li>contact lens.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to put or bring into contact.</li><li>to communicate with: We'll contact you by mail or telephone.</li></ul><p><strong>Verb</strong></p><ul><li>(used without object) to enter into or be in contact.</li></ul><p><strong>Adjective</strong></p><ul><li>involving or produced by touching or proximity: contact allergy.</li></ul>