1.
Walking is the activity of taking walks for exercise or pleasure, especially in the country.
Recently I’ve started to do a lot of ~ and cycling.
...a ~ holiday.
N-UNCOUNT
2.
You can use ~ in expressions like a ~ disaster or a ~ dictionary in order to emphasize, for example, that someone causes a lot of disasters, or knows a lot of difficult words. (HUMOROUS)
He was a ~ encyclopaedia...
ADJ: ADJ n emphasis