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.
1. 'anniversary'. An anniversary is a date when you remember something special that happened on that date in an earlier year. It's our wedding anniversary today. They celebrated the 400th anniversary of Shakespeare's birth. 2. 'birthday'. Don't refer to the anniversary of the date when you were born as your 'anniversary'. You call it your birthday.