The UK's Department for Education and Skills defines numeracy in their National Strategy documents as follows:
Numeracy is a proficiency which is developed mainly in mathematics but also in other subjects. It is more than an ability to do basic arithmetic. It involves developing confidence and competence with numbers and measures. It requires understanding of the number system, a repertoire of mathematical techniques, and an inclination and ability to solve quantitative or spatial problems in a range of contexts. Numeracy also demands understanding of the ways in which data are gathered by counting and measuring, and presented in graphs, diagrams, charts and tables.

Statistics Canada
Numeracy — the knowledge and skills required to effectively manage the mathematical demands of diverse situations.
Building on Our Competencies: Canadian Results of the International Adult Literacy and Skills Survey