<p><strong>Verb</strong></p><ul><li>(used with object)<ul><li>to unite formally, as by treaty, league, marriage, or the like (usually followed by with or to): Russia allied itself to France.</li><li>Synonyms: wed, combine, join, unify.</li><li>to associate or connect by some mutual relationship, as resemblance or friendship.</li></ul></li></ul><p><strong>Verb</strong></p><ul><li>(used without object)<ul><li>to enter into an alliance; join; unite.</li></ul></li></ul><p><strong>Noun</strong></p><ul><li>(plural: allies)<ul><li>a person, group, or nation that is associated with another or others for some common cause or purpose: Canada and the United States were allies in World War II.</li><li>Synonyms: confederate, partner.</li><li>Antonyms: adversary, foe, enemy.</li><li>Biology: a plant, animal, or other organism bearing an evolutionary relationship to another, often as a member of the same family: The squash is an ally of the watermelon.</li><li>a person who associates or cooperates with another; supporter.</li><li>Synonyms: helper, assistant, auxiliary, coadjutor, colleague, abettor, accessory, accomplice, aide, friend.</li><li>Antonyms: adversary, foe, enemy.</li><li>a person who advocates for or supports a marginalized or politicized group but is not a member of the group: As a man, how can I be a good ally to women in the struggle for gender equality? Straight allies speak up for the LGBTQ community.</li></ul></li></ul>