To make equal or equivalent; regard or treat as equal.To reduce to an average; make such correction or allowance in as will reduce to a common standard of comparison, or will bring to a true result: as, to equate observations in astronomy.To be equal or equivalent to; equal.In entomology, smooth, as a surface; having no special elevations or depressions. Also equal.To join by the sign of equality.In the preparation of the running schedules for trains, to make an allowance of an imaginary increase in length of line, on account of and as an equivalent of the retardation due to curves.