vt.

1. （用黏或膩的東西）塗抹；塗上（油、油漆等）[（+on/over/with）]
   Her lipstick was smeared around her mouth.

   她的口紅塗到了嘴的四周。

2. 弄髒，弄汙
   Soot smeared our faces.

   煤煙弄髒了我們的臉。

3. 誹謗，中傷
   Some people often smear others.

   有些人常常誹謗別人。

4. 用……抹（或擦）；把……擦模糊
5. 【美】【俚】擊敗；殺掉

vi.

1. 被弄髒
   Be careful; paint may smear.

   小心，油漆會弄髒東西。

2. 被擦模糊

n.[C]

1. 汙跡，汙斑
   There was a smear of blood on the wall.

   牆上有一片血跡。

2. 誹謗，中傷
   That's a vicious smear.

   那是惡意中傷。

3. （顯微鏡的）塗片

v.

1. coat or mark with a greasy or sticky substance.
   ▸spread (a greasy or sticky substance) over a surface.
   ▸blur or smudge.
2. damage the reputation of (someone) by false accusations.

n.

1. a greasy or sticky mark.
2. a false accusation.
3. a sample thinly spread on a microscopic slide.
   ▸Brit. short for smear test.
4. Climbing  an insecure foothold.