Noun
a river that rises in south central New Hampshire and flows through Concord and Manchester into Massachusetts and empties into the Atlantic Ocean
Source: WordNetBy 1853, the Merrimack River Lumber Company was operating. Source: Internet
The Pennacook lived along the Merrimack River in southern New Hampshire. Source: Internet
In the fall and spring the workouts are on the water (the Merrimack River) and inside on the rowing machines. Source: Internet