a person whose work is to carry luggage etc at station, airports, hotels etc; a doorkeeper (at a hotel, public building etc)
person who serves as attendant, caretaker
Cases of word usage
1) a uniformed porter at the entrance to a hotel, large shop etc (commissionaire)
2) a pointed or thin end of something; a small piece put at the end of something; a public place where rubbish is (to be) put; a gift of money to a waiter, porter etc; a small piece of advice; to touch or hit (something) slightly (tip)