adjoin

Meanings

1. 1
   verb

   to attach or add

   I adjoin a copy of your my lawyer's letter.

2. 2
   verb

   to be in direct physical contact with

   The two bedrooms adjoin.

3. 3
   verb

   to lie adjacent to another or share a boundary

   Canada adjoins the U.S.

4. 4
   adj

   to be in direct contact with

   The two adjoining rooms cost two thirds the price of two separate rooms.

5. 5
   verb

   To be in contact or connection with.

   The living room and dining room adjoin each other.

6. 6
   verb

   To extend an algebraic object (e.g. a field, a ring, etc.) by adding to it an element not belonging to it and then ensuring closure, for example by also adding all finite power series of the element.

   The ring adjunction #92;mathbb#123;Q#125;#91;#92;sqrt#123;2#125;#93; can be obtained from #92;mathbb#123;Q#125; by adjoining #92;sqrt#123;2#125; to #92;mathbb#123;Q#125;.

Etymology

From Anglo-Norman adjoindre, from Latin adiungō.