TERF UK /tɜːf/US /tɝf/ noun3 •A trans-exclusionary radical feminist; a radical feminist who does not consider trans women to be women, or thinks they should not be included in female spaces or organisations, and who considers trans men to be women; a person whose transphobia is expressed in feminist terms.Dear “A Lesbian Democrat” Your TERF (trans-exclusionary radical feminist) agenda and what it represents is no better than the bigoted regressive agenda of the religious right. — 2013 •Abbreviation of telomeric repeat-binding factor. •(US) Abbreviation of terrain flight (“flight close to the ground, to avoid enemy detection or fire”).A MAWTS qualified TERF instructor is required for all TERF instructional sorties. — 1980 formsTERFs · terfs