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.
A century (from the Latin centum, meaning one hundred; abbreviated c.) is a period of 100 years. Centuries are numbered ordinally in English and many other languages. For example, the 17th century refers to the years from 1601 to 1700. A centenary is a hundredth anniversary or a celebration of this, typically the remembrance of an event which took place a hundred years earlier.