[Middle English, from Medieval Latin extendere (from Latin) or Anglo-French estendre, from Old French]3
aBritish: to take possession of (something, such as land) by a writ of extent
bobsolete: to take by force
4a: to make the offer of :proffer//extending aid to the needy//extending their greetings//Let me extend my apologies.
b: to make available //extending credit to customers
5a: to cause to reach (as in distance or scope) //National authority was extended over the new territories.
b: to cause to be longer :prolong//extend the side of a triangle//extended their visit another day
also: to prolong the time of payment of
c:advance, further//extending her potential through job training
6a: to cause to be of greater area or volume :enlarge//extended the patio to the back of the house
b: to increase the scope, meaning, or application of :broaden//Beauty, I suppose, opens the heart, extends the consciousness. qualification — MW · Shobdo