Liberal Dictionary English Dictionary
adjective
- not permeable; impassable.
- Chemistry, Geology. (of porous substances, rocks, etc.) not permitting the passage of a fluid through the pores, interstices, etc.
adjective
- (of a substance) not allowing the passage of a fluid through interstices; not permeable
1690s, from French imperméable, from Late Latin impermeabilis, from assimilated form of in- “not, opposite of” (see in- (1)) + permeabilis (see permeable).
adj.
- Impossible to permeate; not permitting passage.
- Relating to a material through which substances, such as liquids or gases, cannot pass. Some substances, such as some types of contact lenses, are permeable to gas but impermeable to liquid.