Approximate/əˈprɑːksɪmət/ Definition 1 of 3Pro Tip 1/3Not Exact Use 'approximate' when precision isn't required and minor errors are acceptable. We made an approximate calculation of the attendees. Pro Tip 2/3Ballpark Figure 'Approximate' suggests a rough estimation, often acceptable in planning stages. The approximate timeframe for completion is two weeks. Pro Tip 3/3Initial Estimates Use 'approximate' for initial quotes or estimates that might change later. The builder gave us an approximate quote for the repairs.