satisfactory (adj)
Sens 1 : Good enough for a particular
purpose (but not outstanding). [source : inspiré de OAAD]
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Sens 2 : Fulfil (a need, desire, etc.); do enought
to meet (a requirement, etc.). *to satisfy somebody's demands [source : Source
inconnue]
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Sens 3 : Sufficient for the needs of the case, adequate.
Of an argument: convincing. [source : OED]