introductory
[adjective]
Synonyms: preliminary, first, inaugural, initial, opening, preparatory

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Antonyms: closing, concluding

[TahlilGaran] English Synonym Dictionary ▲

in‧tro‧duc‧to‧ry /ˌɪntrəˈdʌktəri◂/ adjective [only before noun]
[Word Family: noun: introduction, intro; verb: introduce; adjective: introductory]

1. said or written at the beginning of a book, speech etc in order to explain what it is about
introductory chapter/paragraph
the objectives described in the introductory chapter
as the chairman said in his introductory remarks

2. intended for people who have never done a particular activity before:
an introductory course in data processing

3. introductory offer/price etc a special low price that is charged for a new product for a limited period of time:
Don’t miss our introductory offer!

[TahlilGaran] Dictionary of Contemporary English ▲