(historical) A rich satin fabric.

(banking) Initialism of automated teller machine or initialism of automatic teller machine. / (slang, by extension) Any source of a large amount of money. / (computing) Initialism of Adobe Type Manager.

(Internet slang, text messaging) Initialism of at the moment.

(obsolete, slang) A bad bill of exchange, drawn on persons who have no effects of the drawer.

(physics, chemistry) Of or relating to atoms; composed of atoms; monatomic. / Employing or relating to nuclear energy or processes. / Infinitesimally small.

(computing) An atomic operation.

Making amends to restore a damaged relationship; expiation. / (theology, often with capitalized initial) The reconciliation of God and mankind through the death of Jesus.

(idiomatic) an instantaneous attraction

(physics) The ratio of the average mass per atom of the naturally occurring form of an element to 1/12 of the mass of a carbon-12 atom. Symbol Aᵣ; abbreviation RAM or r.a.m. For elements with several isotopes, the most stable isotope is treated as the representative.

Initialism of American Telephone & Telegraph, a US telecommunications company.