1. a. The act of beating or pounding. b. Law. The unlawful and unwanted touching or striking of one person by another, with the intention of bringing about a harmful or offensive contact.

2. a. An emplacement for one or more pieces of artillery. b. A set of guns or other heavy artillery, on a warship, for example. c. Abbr. btry. An army artillery unit, corresponding to a company in the infantry.

3. a. An array of similar things intended for use together: took a battery of achievement tests. b. An impressive body or group: a battery of political supporters.

4. Baseball. The pitcher and catcher.

5. Music. The percussion section of an orchestra.

6. Electricity. a. Two or more connected cells that produce a direct current by converting chemical energy to electrical energy. b. A single cell, such as a dry cell, that produces an electric current.