1. To beg someone or appeal in earnest to someone's good nature for something to happen or be granted. The prisoner threw himself at the king's feet, pleading for his life. Daniel pleaded for a bit more time to finish the project, but the boss went ahead and fired him for the delay.
2. To beg someone or appeal in earnest to someone's good nature for someone to be spared some fate or treatment. The mother pleaded for her son, but the king had him executed on the spot. She pleaded for her brother when their mother threatened to whip him with the belt.
plead for someone
to beg for someone to be spared. Tom pleaded for Dave, but it was no use. Dave was found guilty. She pleaded for her husband, but the judge sentenced him to ten years in prison.
plead for something
to beg for something. I don't want to have to plead for what's already mine. The children were pleading for ice cream, so we got some for them.