preliminary
1. [ adjective ] designed to orient or acquaint with the a situation before proceeding
Examples:

"a preliminary investigation"

Related terms: exploratory
2. [ noun ] (sport) a minor match preceding the main event
Synonyms: prelim
Related terms: athletic_contest
3. [ noun ] something that serves as a preceding event or introduces what follows
Synonyms: prelude overture
Examples:

"training is a necessary preliminary to employment" "drinks were the overture to dinner"

Related terms: origin prelude
Similar spelling:   prolamine