What is a synonym for "in form"?

Common synonyms include: grooving, no change in concentration.

In form

prep_phrase

prep_phrase ·Rare ·Advanced level

Prep_phrase

1
As a matter of form; formally.
"[I]t being unlikely, he ſays, that he can procure in the time, a letter from Lady Betty, under her own hand, inviting me in form to her houſe, […]"
2
Having good form; fit, performing well.
"Manchester United's in-form striker rose to head home Stewart Downing's corner and then rounded off a sweeping counter-attack involving Theo Walcott and Ashley Young to wrap up the formalities seconds before the break."

"[I]t being unlikely, he ſays, that he can procure in the time, a letter from Lady Betty, under her own hand, inviting me in form to her houſe, […]"