Definition of "vigorous"

Life in the country will be fuller, richer, and more comfortful, because it is freer, healthier, and more vigorous.

1895, Annual Report of the Ohio State Board of Agriculture, page 280

Now there are twenty-nine skaters on Wollman RinkCircling in singles and in pairsIn this vigorous anonymity

1976, Joni Mitchell (lyrics and music), “Song for Sharon”