(algebra) An ideal I in an algebraic object R (which could be a ring, algebra, semigroup or lattice) that is generated by a given single element a ∈ R; the smallest ideal that contains a.

(algebra) A subring which is closed under left-multiplication by any element of the ring.

(algebra) A subring which is closed under right-multiplication by any element of the ring.

(slang) To make a lot of money.

(grammar) The infinitive form of an English verb without the particle to; a comparable infinitive in other Germanic languages, e.g. a German infinitive without a preceding "zu", or a Swedish one without a preceding "att".

(algebra) An integral domain in which every ideal is a principal ideal.

(algebra) A subring which is both a left ideal and a right ideal. Commonly referred to simply as an ideal, but referred to as two-sided ideal for emphasis.

(idiomatic) To know all there is to be known about a certain discipline.

All people are connected to and dependent on other people.

(humorous, euphemistic) Lacking in intelligence; dimwitted.