| 1. | giving form or shape; forming; shaping; fashioning; molding: a formative process in manufacturing. |
| 2. | pertaining to formation or development: a child's most formative years. |
| 3. | Biology.
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| 4. | Grammar. pertaining to a formative. |
| 5. | Grammar. a derivational affix, particularly one that determines the part of speech of the derived word, as -ness, in loudness, hardness, etc. |
| 6. | Linguistics. (in generative grammar) any element, as a word, affix, or inflectional ending, functioning as a minimal syntactic unit that can be used in forming larger constructions. |