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1. To exit, escape, or depart (from something or some place) very quickly or all at once. People came rushing out of the burning building. I opened the lid of the saucepan and plume of steam rushed out.
2. To cause or direct someone or something to exit, escape, or depart (from something or some place) in a very hasty or frantic manner. In this usage, a noun or pronoun can used between "rush" and "out." The security guards rushed everyone out of the building after the first gunshot went off. I hate having to rush out the kids in the morning, but they always take so long to get ready for school. After the machine caught fire in the lab, we rushed it out and sprayed it with a fire extinguisher.
3. To develop and release some product very hastily, especially resulting in a reduction in quality. In this usage, a noun or pronoun can be used between "rush" and "out." After the surprise success of the low-budget horror film, the studio was eager to rush out a sequel in time for Halloween the following year. A lot of the phone's technical issues could have been fixed in development if they hadn't rushed it out to market.
rush out (of something)
to exit in a hurry. Everyone rushed out of the room at the same time. They rushed out because they smelled smoke.