England produced the most impressive display of their campaign in France so far when they defeated Norway 3-0 on Thursday and made the last four for a third successive major tournament.
Mead added: "We're getting momentum and growing into the tournament. We're playing some good football and we're trying to do it consistently over 90 minutes.
"You're going to have patches where you don't play so well, but I think we rode that out, played some good football on Thursday and scored three goals.
"As a team we generally don't go OTT on celebrating but we're in the semi-final of a World Cup, it's an amazing feeling, and the girls just went for it on Thursday night. It showed how much it meant to us, to win like we did on such a big occasion, and get to a semi-final.
"I think there's a great belief in the team, a great togetherness, and we really do believe we can go on and win it. We've just got to actually do it on the pitch now."
Mead started England's first two group games and set up Jodie Taylor's winner in the second, the 1-0 win against Argentina.
With Toni Duggan, recovered from a thigh issue, having taken her place on the left of the attack, Mead subsequently spent the next two matches as an unused substitute.