In terms of the definition, every taxpayer in Canada is entitled, within the purview of the Income Tax Act, to reduce and minimize their tax. There is an element of tax planning that is permissible. What we find is that there is a point in time where the tax planning becomes aggressive, and then it moves into the tax avoidance area, where the spirit of the act has been broken but the letter of the act is correct, as opposed to tax evasion, where you find a taxpayer who has purposely attempted to hide income, for example.
Evidence of meeting #102 for Finance in the 41st Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was evasion.
A recording is available from Parliament.