Sends out or gives off something, like light, heat, sound, or gas.
From Latin 'emittere' (to send out), combining 'e-' (out) and 'mittere' (to send). The word entered English in the 17th century in scientific contexts.
The sun emits light that took 8 minutes to reach Earth, and that same light has been traveling through space since long before humans existed—we're literally seeing the past when we look at stars.
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