Dic: a touch of something, a touch

• She thought she just had a touch of flu.
• We were all a touch uneasy, I think.
• I found it a touch distasteful.

QUANT : QUANT of n-uncount | A touch of something is a very small amount of it.

PHRASE : PHR adj/adv/prep | You can use a touch to mean slightly or to a small extent, especially in order to make something you say seem less extreme. For example, if you say that something is a touch expensive, you might really think that it is very expensive.[mainly BRIT]

(= a bit)

.... Cobuild