1. [n]  the foam resulting from excessive sweating (as on a horse)
2. [n]  the froth produced by soaps or detergents
3. [n]  a workman who puts up laths
4. [n]  agitation resulting from active worry; "don't get in a stew"; "he's in a sweat about exams"
5. [v]  rub soap all over, usually with the purpose of cleaning
6. [v]  form a lather; "The shaving cream lathered"
7. [v]  cover with soap
8. [v]  beat severely with a whip or rod; "The teacher often flogged the students"; "The children were severely trounced"

Lather
Lather

more details ...

1. \Lath"er\, n. [AS. le['a][eth]or niter, in
   le['a][eth]orwyrt soapwort; cf. Icel. lau?r; perh. akin to E.
   lye.]
   1. Foam or froth made by soap moistened with water.
   2. Foam from profuse sweating, as of a horse.
   

2. \Lath"er\, v. t. [imp. & p. p. {Lathered}; p. pr. & vb.
   n. {Lathering}.] [AS. l[=e][eth]rian to lather, anoint. See
   {Lather}, n. ]
   To spread over with lather; as, to lather the face.
   

3. \Lath"er\, v. i.
   To form lather, or a froth like lather; to accumulate foam
   from profuse sweating, as a horse.
   

4. \Lath"er\, v. t. [Cf. {Leather}.]
   To beat severely with a thong, strap, or the like; to flog.
   [Low]