In plain English
Incubators work with founders who may have little more than an idea. They offer a place to work, advice and introductions while the team figures out what to build. Many are run by universities, cities or companies, and not all of them take a share of the business.
Example
A university incubator gives two student founders free desk space, legal help and weekly mentor sessions while they build their first MVP.
Not the everyday meaning
A heated box that keeps eggs or newborn babies warm.
Why it matters
Incubators make starting a company cheaper and less lonely. Founders get advice, office space and introductions to customers and investors they couldn't easily reach alone. Being part of a known program can also make a young startup easier to trust.
Common confusion
Incubator vs. accelerator. Accelerators run short, fixed programs, often about three months. They usually invest money in exchange for equity and end with a demo day for investors. Incubators come earlier, last longer and are more open-ended.