diode such that light emitted at a p-n junction is proportional to the bias current; color depends on the material used
"The engineer replaced the old bulb with an LED, which emits light whose intensity increases as more electricity flows through its semiconductor junction."
light-emitting diode
"The traffic signal changed from red to green, and a bright LED illuminated the crosswalk."
simple past tense and past participle of lead
"The red car led us to a hidden cave where we found ancient treasures."
In plain English: To lead means to guide someone somewhere by showing them the way.
"The group followed their guide who led them through the dark forest."
Under somebody's control or leadership.
"The new manager led the team through a challenging project by making decisive choices every day."
In plain English: Led describes something that is made of lead, which is a heavy metal used to make weights and pipes.
"The old building had a worn and led appearance after years of neglect due to constant rain exposure."