MERIDEN — Kimball Union Academy has secured a $10 million gift toward the school’s planned Athletics and Wellness Center, part of an ongoing plan to reshape the school’s campus.

The proposed 40,000-square-foot Athletics and Wellness Center, projected to cost $35 million to $40 million, would be attached to the school’s Barn Field House.

The gift, from Phillip H. Morse, who attended KUA for the 1959-60 school year, is …