(transitive) To arrange an index for something, especially a long text. / To inventory, to take stock.

(idiomatic, slang) The time of occurrence of an event that will never happen.

(grammar) The infinitive mood or mode (a grammatical mood).

(grammar) Formed with the infinitive. / Unlimited; not bounded or restricted; undefined.

(often in the plural) A relative by marriage (or through affinity). / Sometimes specifically a parent-in-law of one's child, for which the dedicated terms co-mother-in-law, co-father-in-law are rare.

The mother of one's spouse. / A mother-in-law apartment. / A mother-in-law sandwich. / (dated) A stepmother.

The husband of one's child.

The wife of one's child.

One's spouse's father. / (dated) A stepfather.

Of or relating to India or its people; or (formerly) of the East Indies. / (obsolete) Eastern; Oriental. / Of or relating to the indigenous peoples of the Americas.