fixative
US /ˈfɪk.sə.t̬ɪv/
UK /ˈfɪk.sə.t̬ɪv/
1.
a substance used to fix, protect, or preserve something
:
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The artist sprayed a layer of fixative over the charcoal drawing to prevent smudging.
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This hairspray acts as a strong fixative, keeping your style in place all day.
1.
serving to fix, protect, or preserve
:
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The museum uses a special fixative spray to protect ancient manuscripts.
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The photographer applied a fixative solution to the prints to ensure their longevity.