形容词

1. 多孔的；能渗透的
Something that is porous has many small holes in it, which water and air can pass through.

2. 多漏洞的；松懈的
If something such as a defence or a barrier is porous, it can be penetrated or crossed easily.

1. full of pores or vessels or holes

Synonym: poriferous

2. allowing passage in and out

e.g. our unfenced and largely unpoliced border inevitably has been very porous

Synonym: holey

3. able to absorb fluids

e.g. the partly porous walls of our digestive system
compacting the soil to make it less porous