1 This helps keep your upper back straight while having a slight arch in your lower back. 2  Slowly lift by straightening your hips and knees (not your back). Keep your back straight, and don't twist as you lift.  Hold the load as close to your body as possible, at the level of your belly button.
Definition of birthday. 1  1a : the day of a person's birthb : a day of origin. 2  2 : an anniversary of a birth her 21st birthday.
Definition of anniversary. plural. anniversaries. 1 : the annual recurrence of a date marking a notable event a wedding anniversary; broadly : a date that follows such an event by a specified period of time measured in units other than years the 6-month anniversary of the accident. 2 : the celebration of an anniversary.