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pre‧par‧a‧to‧ry

1 [only before noun] done in order to get ready for something :
preparatory talks to clear the way for a peace settlement
preparatory drawings
A lot of preparatory work still needs to be done.
preparatory talks to clear the way for a peace settlement
preparatory drawings
A lot of preparatory work still needs to be done.2 before something else and in order to prepare for it :
The partners held several meetings preparatory to signing the agreement.
preparatory to something
formal
The partners held several meetings preparatory to signing the agreement.