Catalyzes the formation of diacylglycerol from 2-monoacylglycerol and fatty acyl-CoA. a 2-acylglycerol + an acyl-CoA = a 1,2-diacyl-sn-glycerol + CoA (9Z)-octadecenoyl-CoA + 2-(9Z-octadecenoyl)-glycerol = 1,2-di-(9Z-octadecenoyl)-sn-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-(9Z-octadecenoyl)-glycerol = 1,2-di-(9Z-octadecenoyl)-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + butanoyl-CoA = 1-butyryl-2-(9Z)-octadecenoyl-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + octanoyl-CoA = 1-octanoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + dodecanoyl-CoA = 1-dodecanoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + tetradecanoyl-CoA = 1-tetradecanoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + hexadecanoyl-CoA = 1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + octadecanoyl-CoA = 1-octadecanoyl-2-(9Z-octadecenoyl)-sn-glycerol + CoA 2-(9Z-octadecenoyl)-glycerol + eicosanoyl-CoA = 1-eicosanoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA (9Z,12Z)-octadecadienoyl-CoA + 2-(9Z-octadecenoyl)-glycerol = 1-(9Z,12Z)-octadecadienoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA (5Z,8Z,11Z,14Z)-eicosatetraenoyl-CoA + 2-(9Z-octadecenoyl)-glycerol = 1-(5Z,8Z,11Z,14Z)-eicosatetraenoyl-2-(9Z)-octadecenoyl-sn-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-dodecanoylglycerol = 1-dodecanoyl-2-(9Z-octadecenoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-tetradecanoylglycerol = 1-tetradecanoyl-2-(9Z-octadecenoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-hexadecanoylglycerol = 1-hexadecanoyl-2-(9Z-octadecenoyl)glycerol + CoA (9Z)-octadecenoyl-CoA + 1-octadecanoylglycerol = 1-octadecanoyl-2-(9Z)-octadecenoylglycerol + CoA (9Z)-octadecenoyl-CoA + 1-(9Z,12Z-octadecadienoyl)-glycerol = 1-(9Z,12Z-octadecadienoyl)-2-(9Z-octadecenoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-(9Z,12Z,15Z-octadecatrienoyl)-glycerol = 1-(9Z,12Z,15Z-octadecatrienoyl)-2-(9Z-octadecenoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-(5Z,8Z,11Z,14Z-eicosatetraenoyl)-glycerol = 1-(5Z,8Z,11Z,14Z-eicosatetraenoyl)-2-(9Z-octadecenoyl)-glycerol + CoA hexadecane-1,2-diol + hexadecanoyl-CoA = 2-hydroxyhexadecyl hexadecanoate + CoA (9Z)-octadecenoyl-CoA + 1-decanoylglycerol = 1-decanoyl-2-(9Z-octadecenoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-O-(9Z-octadecenyl)-glycerol = 1-O-(9Z-octadecenyl)-mono-(9Z-octadecenoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1,2-di-(9Z-octadecenoyl)-sn-glycerol = 1,2,3-tri-(9Z-octadecenoyl)-glycerol + CoA (9Z)-octadecenoyl-CoA + 1-O-(9Z-octadecenyl)-mono-(9Z-octadecenoyl)-glycerol = 1-O-(9Z-octadecenyl)-2,3-di-(9Z-octadecenoyl)glycerol + CoA Glycerolipid metabolism; triacylglycerol biosynthesis. Belongs to the diacylglycerol acyltransferase family.