n.

1. （青）草；牧草[U][C]
   Cattle eat grass.

   牛吃草。

2. 草地；草坪；牧地[U]
   They are sitting on the grass.

   他们坐在草地上。

3. 【植】禾本科植物[P1][U]
4. 【俚】大麻[U]

vt.

1. 【美】使吃草，放牧
2. 使长满草；在……上种草[（+over）]

vi.

1. 长草

n.

1. vegetation consisting of short plants with long narrow leaves, growing wild or cultivated on lawns and pasture.
   ▸ground covered with grass.
2. a plant with jointed stems and spikes of small wind-pollinated flowers, predominant in such vegetation. [Family Gramineae: many species.]
3. informal cannabis.
4. Brit. informal a police informer.

v.

1. cover with grass.
2. (often grass on) Brit. informal inform the police of criminal activity or plans.
3. land (a fish).
4. chiefly Rugby  & Australian Rules  knock down.