firm up

Verb

idiomatic transitive

(transitive, idiomatic) To make tentative plans more definite. / (transitive) To make muscles more toned through physical exercise.

Japanese Meaning

暫定的な計画を確定させる、具体的なものにする / 筋肉を引き締める、体を引き締める

We need to firm up the meeting time before we send the invitations.

招待状を送る前に、会議の時間を確定しておく必要があります。

Sense（1）

(transitive, idiomatic) To make tentative plans more definite.

Can we firm up plans for the barbecue Sunday?

Sense（2）

(transitive) To make muscles more toned through physical exercise.

He hopes to firm up his biceps a bit before meeting the girls.

firms up

（ present singular third-person ）

firming up

（ participle present ）

firmed up

（ participle past ）

firmed up

（ past ）