signed meaning
EN
[saɪnd] 
US - VerbBFsignSGsignsPRsigning
- simple past tense and past participle of sign.
- simple past tense and past participle of sign.
- AdjectiveBFsign
- (mathematics, computer science) Having both positive and negative varieties.
- It wasn't until they tried to subtract 3 from 1 that the elementary school students realized they needed signed numbers.
- Having a signature, endorsed.
- The signed check could be cashed.
- (of a road, route) Furnished with signs and signposts; signposted.
- (mathematics, computer science) Having both positive and negative varieties.
- More Examples
- Used in the Middle of Sentence
- We have found that a patrolman in the central section of the city can switch on, and later switch off, 100 signs with ease.
- In response to the letter writer (June 14) who suggests I fuhgeddaboud signing copies of my book “Forever Blue” in Brooklyn:
- Last night, I thought he'd sign the deal, but this morning he'd got wised somehow.
- Used in the Beginning of Sentence
- Signs of such conflicts could be seen in the protest against numeri clausi at universities
- Used in the Ending of Sentence
- Two patients presented with occipitalgia, two patients presented with torticollis and three patients developed neurologic signs.
- Used in the Middle of Sentence
Definition of signed in English Dictionary
- Part-of-Speech Hierarchy
- Adjectives
- Uncomparable adjectives
- Uncomparable adjectives
- Verbs
- Verb forms
- Participles
- Past participles
- Past participles
- Verb simple past forms
- Participles
- Verb forms
- Adjectives
- en signed on
- en signed up
- en signed in
- en signed off
- en signed out
Source: Wiktionary
Grammatically, this word "signed" is an adjective, more specifically, an uncomparable adjective. It's also a verb, more specifically, a verb form.