verb

• (of separate elements) To join into a single mass or whole.
• (of a whole or a unit) To form from different pieces or elements.
• (engineering) To bond pieces of metal into a continuous whole by liquefying parts of each piece, bringing the liquids into contact, and allowing the combined liquid to solidify.
• (of separate groups or persons) To merge, to intermingle freely.
• (databases, SQL) To convert a null value to a defined value.