Definition of "anti"

On one occasion, franchise supporters accused antis of dumping lemons, wet sponges, rolls of ticker tape, bags of water, and garbage pails on innocent suffrage supporters parading outside the anti-suffrage offices.

2002, Thomas Jablonsky, “Female Opposition: The Anti-Suffrage Campaign”, in Jean H. Baker, editor, Votes for Women: The Struggle for Suffrage Revisited (Viewpoints on American culture), Oxford University Press, page 121

Antis jumped on this announcement, calling it vote buying and indicative of the hypocrisy of prohibitionists who talked incessantly in the first election about the immorality of the antis' vote-buying efforts.

2012, H. Paul Thompson, Jr., A Most Stirring and Significant Episode: Religion and the Rise and Fall of Prohibition in Black Atlanta, 1865–1887, page 222

While I did not directly analyze how the antis define feminism, it appears that they believe Sarah J Maas as an author is a white feminist and therefore unable to write anything feminist.

2018, Sarah Leiser, "Throne of Fans: Examining the Roles of Feminism, Platform, and Community in an Online Fandom", thesis submitted to the University of Denver, page 94

Other fans or viewers are thus not coded as fans but instead positioned as either homophobic, angry "antis" (even if they ship Johnlock or other queer ships) or as the outsider "casuals" who aren't dedicated or smart or invested enough to properly interpret Sherlock.

2019, Emily E. Roach, "Supernatural: Wincest and Dean Winchester's Bisexual Panic", in "From Canon to Politics: Queerbaiting and The CW's Supergirl", in Queerbaiting and Fandom: Teasing Fans Through Homoerotic Possibilities (ed. Joseph Brennan), page 89

The VLD fandom especially has cultivated a definition of antis as ones against a moral or societal ill (e.g., pedophilia, incest).

2021, Rebecca Williams, A Fan Studies Primer: Method, Research, Ethics‎, page 72

I do not consider myself either a twitcher or an expert. Neither am I anti twitching.

2000, Bill Oddie, Gripping Yarns, page 21