Afriyie Acquah cancelled out Gervinho's opener in this rescheduled clash at the Stadio Olimpico, but Francesco Totti, Miralem Pjanic and Rodrigo Taddei earned the hosts a fine win
Both sides contributed greatly to a game that had had to be abandoned after just eight minutes of play back in February because of torrential rain. The hosts opened the scoring through Gervinho only to see the Giallorossi equalize almost immediately courtesy of Afriyie Acquah.
However, Francesco Totti put Roma back in front with an emphatic finish before Miralem Pjanic and Rodrigo Taddei added second-half goals to render Jonathan Biabiany's late strike purely academic.
With Napoli having upset Juventus at the San Paolo on Sunday, the pressure was on Roma to restore its nine-point advantage over the Partenopei in the battle for second place.
Although Giallorossi coach Rudi Garcia has conceded the title, there was also the opportunity to close to within eight points of the league-leading Bianconeri.
Parma, meanwhile, knew that a win would see it move about fifth-placed Inter and into a Europa League place.
In that context, it was hardly surprising that the two sides produced a wonderfully open affair.
Rodrigo Taddei released Gervinho down the right wing with 12 minutes on the clock and he passed inside Totti, who put Mattia Destro in on goal with a sublime first-time pass. The striker's shot came back off the base of the far post but Gervinho was following up to put Roma ahead with the simplest of finishes.
Parma equalized in the 15th minute, with Acquah controlling a pass from Massimo Gobbi on his chest before spinning and then shooting into the bottom-left corner in one fluid movement.
The Gialloblu were level for less than 60 seconds, though, as Pjanic surged down the right flank before pulling back for Totti, who blasted the ball past Antonio Mirante from the edge of the area.
Roma really should have extended the advantage before the break but the unlucky Destro, who also had a goal disallowed, cannoned a header against the bar, after being brilliantly picked out by Maicon.
Garcia's men continued to attack relentlessly after the restart, though, and deservedly went 3-1 up four minutes into the second half when Pjanic pounced on a loose ball in the area, after Gervinho had been denied.
Despite the relative comfort of a two-goal advantage, Roma continued to press and its admirable attacking endeavor was rewarded again when Taddei found the far corner with a majestic near-post header.
Parma grabbed a late consolation, with Biabiany beating Morgan De Sanctis with a stunning first-time strike in the dying seconds - fitting reward for its efforts during what was a wonderful advert for Serie A.