(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.

A person from India. / An American Indian, a member of one of the indigenous peoples of the Americas (generally excluding the Aleut, Inuit, Metis, or Yupik).

(nonstandard) Any of the (unrelated) languages spoken by American Indians. / (nonstandard, rare) Any language spoken by natives of India, especially Hindi.

The sister of one's spouse. / The wife of one's sibling. / The wife of the sibling of one's spouse. / The sister of the spouse of one's sibling.