Etymology From tel, telle + -ment. Pronunciation IPA(key): /tɛl.mɑ̃/ Audio:(file) Adverb tellement so; so much; very Il est tellement bon !He is so good! so much (singular); so many (plural) Il y a tellement de gens ici ce soir.There are so many people here tonight. so much (gives a reason for the preceding statement) Tout le quartier en profite, tellement tu claironnes !You're yelling so loud that the whole neighbourhood can hear you! Related terms tel/telle/tels/telles Further reading “tellement”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.