Signature of intransitive verbs; symbol
Sign; signal
Example: Please check it and sign here.
Please check it and sign here.
Signal ['siɡn? L] n. signal; Codeword; blasting fuse
Signal; symbol
Remarkable; Make conspicuous
sending signal
Example: Can you hear the signal?
Can you hear the signal?
Self-adhesion; label
Example: Teacher Ma, you should mark all the names under each picture.
Ms. Ma, you should write all the names at the bottom of each picture.
What matters is the difference in meaning, right? When you say a verb, you mean to mark it.