Yes, it is a form of the verb "to characterize" (to portray, to define). It is the past tense and past participle of the verb.
The past participle of "define" is "defined."
defined
The word define is a verb. The past tense is defined.
Sat is a past form. Sat is the past form of the verb sit.Sat is a past form. Sat is the past form of the verb sit.Sat is a past form. Sat is the past form of the verb sit.Sat is a past form. Sat is the past form of the verb sit.Sat is a past form. Sat is the past form of the verb sit.Sat is a past form. Sat is the past form of the verb sit.Sat is a past form. Sat is the past form of the verb sit.Sat is a past form. Sat is the past form of the verb sit.Sat is a past form. Sat is the past form of the verb sit.
The past form of come is came.
The past participle of "form" is "formed."
The past form of stop (and also the past participle)is stopped.
there is no past form of bus
The past form is 'sold'
The past form of advise is advised.
The past tense form of "destroy" is "destroyed."