the age at which a person becomes legally competent to consent to marriage or sexual intercourse.
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British Dictionary definitions for age of consent
the age at which a person is considered legally competent to consent to sexual intercourse
the age at which a person can enter into a legally binding contract
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012