Wi-Fi is a wireless networking technology that allows computers (laptops and desktops), mobile devices (smart phones and wearables), and other devices to connect to the Internet (printers and video cameras). It enables these and other devices to communicate with one another, forming a network. Wifi full form is Wireless Fidelity, and this is the overall gist of wifi definition and meaning
A wireless router is used to connect to the internet. When you connect to Wi-Fi, you're connecting to a wireless router that connects your Wi-Fi-enabled devices to the Internet.
A wireless access point (AP) is a network device that links wireless devices. A Cisco wireless network makes it easy to add new devices to the network and provides flexible support for mobile workers.
A wireless access point accomplishes the same thing for your network as an amplifier for your home sound.
An access point extends a router's bandwidth, allowing more devices to connect to the network from further away.
A wireless access point, on the other hand, does more than merely provide additional Wi-Fi coverage.
It can also provide critical information about network devices, as well as proactive monitoring.